One pound (100 pence) in British Sterling (GBP). Can refer to the actual denomination (a goldish looking coin, about a centimetre and a half across), or any amount in Sterling. In very common use, all across the UK.
"That'll be a quid mate"
"That's going to set you back about 3, 4 hundred quid"
By Dennie
Quids In
1. When you stand to make a lot of money from a bet or business venture.
2. When your the likelihood of scoring with a particular woman is exceptionally high.
A singular unit of currency, once recognized only as the British pound (100 pence) but now widely used in place of the word dollar, pound, peso, et cetera.
Man: I'll give you twenty quid.
Whore: Sorry, mate, that's not enough to get in my boot!
In regards to the drug Salvia, taking the Salvia leaves and rolling them into a ball. This is known as a quid and is chewed on for 15 minutes, instead of being smoked as usual.