[carrrnuttt]

Here's a good one:
cigarette = fag

And here's some more "Britishm's":
biro: Bic / ball-point pen
Bob's your uncle: there you are etc.
call: to visit or telephone someone (erm....)
flares: bell-bottoms
"Number two's" (slang): faeces / poo / s**t (rhyming slang)
out on the pull: trying to find a sexual partner for the evening
pavement: Sidewalk
ring: call on the telephone
skiving: to shirk from doing any work
snog: any kiss that isn't platonic <;-)
Sorry?: Huh ? What ?
take the piss: to make fun of, to deflate one's ego
ta: Thanks (informal)
wanker: The British equivalent of "jerk", a derogatory term for someone who masturbates.