The colour green means that you are a little bit naive.
It can mean the following:
I think you mean "the green-eyed monster," which is slang for being jealous.
It's not an idiom. It's American slang for money, because American paper bills are green (and they fold when you put them in your pocket).
If you mean slang as in internet slang, then it means "Certified Old Fart".
Rohypnol, a tranquiliser people use to get high or as a date rape tablet
slang for American money
Slang is slang It's the s' "LANG " uage.
In old slang, milkshake mean butt.
It is slang for having sex.
Dough is a slang word for money.
he means what does being a sponge mean in slang
Cool itself, unless you are using it to mean mildly cold, is a slang word. Just because it is old slang doesn't mean that it is not still slang.
Dollar could be: "Buck" or "green"