If you mean Trucking, it refers to drug smuggling involving the mob
If you mean slang as in internet slang, then it means "Certified Old Fart".
Garrett mean in cockney slang
Slang is slang It's the s' "LANG " uage.
In old slang, milkshake mean butt.
It is slang for having sex.
he means what does being a sponge mean in slang
Dough is a slang word for money.
Soup In Slang Means Ugly.
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.
''Dill'' means ''idiot'' as australian slang.
Tat is also slang for tattoo
An egghead is slang for an intellectual, or a nerd.