1. “How’s your father,” “Rumpy pumpy,” “Good rogering”
Meaning: To possess sex, lovemaking, get “your groove on.”
2. “Going to experience some footy”
Meaning: Likely to play soccer.
3. “I’ll provide you with a couple of fives”
Meaning: You’re getting a punch hard.
4. “That would be a right bodge job”
Meaning: That job went wrong.
5. “Oh bloomin ‘eck”
Meaning: A non-curse word exclamation.
6. “That’s pants”
Meaning: It’s not great, of low quality.
7. “I’m knackered”
Meaning: I’m tired, exhausted.
8. “Don’t get shirty beside me,” “Don’t get the knickers inside a twist,” “You’re making my goat,” “Wind your neck in”
Meaning: Someone’s getting angry or irritated along with you or else you’re getting annoyed or inflammed together.
9. “I was gobsmacked”
Meaning: I had been shocked, lost for words.
10. “She was speaking 19 towards the dozen”
Meaning: She was speaking in a fast rate.
11. “It’s all gone pear-formed”
Meaning: Something went wrong.
12. “She’s an open-air picnic lacking a sandwich,” “She’s a slice lacking a loaf”
Meaning: She’s just a little dopey, not so clever.
13. “She’s as vibrant like a button”
Meaning: She’s clever.
14. “He’s as mad as box of frogs,” “He’s crackers”
Meaning: He’s mad. He’s dropped it.
15. “Spend a cent,” “Going for any slash”
Meaning: To go to the restroom.
16. “Well that’s tossed a spanner within the works”
Meaning: Plans go awry, a curveball continues to be tossed.
17. “We’re getting the right old knees up,” “Heading on the tiles,” “Out around the lash”
Meaning: To visit out for that night to have fun. To party.
18. “I’m on the pull tonight”
Meaning: To visit out searching for a girl or man that to savor an intimate liaison (see #1.). To obtain ‘laid’.
19. “I’m getting served by him/her”
Meaning: I’m likely to hug/snog that individual.
19. “I’m quids in” / “I’m skint” / “Have you have any dosh?”
Meaning: You’ve enter into money / You’ve got no money / You’re asking someone should they have anything.
20. “Sweet Fanny Adams”
Meaning: Nothing, for example when being requested that which you did during the day or that which you’re presently doing.
21. “It’s just Sod’s law”
Meaning: Just like ‘Murphy’s Law’ — what’s going to take place, may happen.
22. “It’s parky out” or “It’s brass apes out”
Meaning: It’s cold outdoors.
23. “She’s this type of curtain twitcher” or “Stop being this type of nose cream”
Meaning: She’s a nosy neighbor, stop being so nosy.
24. “Did the thing is her? She’s this type of chav”
Meaning: An English stereotype for any ‘low class’ person or someone putting on ‘cheap’ clothes.
25. “That’s smashing,” “Super,” “Ace,” “Pucker”
Meaning: That’s “awesome.”
26. “Did you simply fluff?” or “Did you simply pop?”
Meaning: Have you just fart?
27. “He’s your dog’s danglies,” “It’s the mutt’s nuts”
Meaning: He’s the very best, it’s the very best. First class.
28. “Nice baps,” “Look at individuals bristols,” “Look at individuals rose buds”
Meaning: Nice breasts.
29. “Old Blighty”
Meaning: Britain.
30. “Oh, he’s a Bobby,” “They call him up PC plod”
Meaning: He’s a policeman, he’s a cop.
31. “I’ll ring you,” “I’ll provide you with a bell,” “I’ll provide you with a tinkle”
Meaning: I’ll phone you.
32. “He’s this type of plonker,” “ponce,” “pillock,” “tosser,” “ twit,” “knob,” “bellend”
Meaning: He’s not so nice / He’s a fool.
33. “Stop being this type of big girl’s blouse”
Meaning: Stop being this type of wimp.
34. “Toodle Personal injury protection!” or “Ta ta!”
Meaning: Goodbye.
35. “I’m just getting a fag”
Meaning: I’m just getting a cigarette.
36. “I’m totally cack-handed”
Meaning: I’m not coordinated.
37. “He’s this kind of anorak”
Meaning: He’s this type of geek.
38. “Don’t be this type of wind-up merchant”
Meaning: Stop teasing.
39. “Having a great old chinwag”
Meaning: Getting a gossip/chat.
40. “She’s had a face just like a bag filled with spanners” / “She includes a face just like a cat’s arse”
Meaning: She’s not so attractive / She’s pulling a ‘sour’ face.
41. “Meat and 2 veg”
Meaning: A guy’s ‘private parts’
42. “She’s so gobby”
Meaning: She’s very mouthy, rude.
43. “She/he/it’s minging”
Meaning: She/he/it’s not so nice, disgusting.
44. “That’s mint, that’s”
Meaning: Perfect condition, perfect.
45. “Careful, he’s around the chunder bus”
Meaning: He’s likely to be sick, provide.
46. “Oh stop whinging on”
Meaning: Stop moaning.
47. “You look smart”
Meaning: You’re well outfitted.
48. “That’s lush”
Meaning: That’s nice, or that tastes good.
49. “I’m feeling really grotty”
Meaning: Feeling sick, not well.
50. “Ta!”
Meaning: Thanks! 
Resourse: https://matadornetwork.com/notebook/50-british-phrases-americans-just-dont-understand/
Americans Guess What British Slang Words Mean
Video COMMENTS:
MAXimus LAWLESSnessTM: Who doesn't like to go to nan-toes, eat a bellend and wash it down with a glass of knobhead.
Lps Wolvezz: Fantastic claps I'm in tears
Neutral Milk Tho: As a brit I laughed too much at the bellend. Fucking fresh prince of bellend.
Busby Babes: 3:22 can you eat it? HAHAHAHAHA
DEMON Or No Car: Q. What is a Bellend?\nA. Something that's pretty nice. You could eat it.\nOmfg 😂 man these Americans. Proud to be British 👍✊
Greg Pasquier: OK, thanks. I've never been outside of an airport in the UK, unfortunately.
Christy Drennan: Greg Pasquier it's understandable
eDups: Who the fuck doesn't know what banter means?
OU812: AlixAkroyd of course. but he was asking what slang words were. naturally, they all thought it was in a slang way. people in America know what banter means. but if it were tossed in with slang, it's assumed it'll be in a slang way.
Antonia xx: I diddnt know until 2 years ago (I used to live under a rock)