I was telling my American friends about the fag word when I was over there, like if someone is going out for a fag it's a smoke. I got strange looks lol
A shag is also a dance I think from the 40s or 50s. I like the word too
Then we have the old Cockney rhyming slang that even most Brits probably don't understand.
Apples are stairs as in "apples and pears"
Whistle is a suit as in "whistle and flute"
Dog is a telephone as in "dog and bone"
get the idea ? lol
I was on the dog the other day and saw this geezer in a shiny whistle going up the apples