A mark refers to a target or intended victim. It is typically used in reference to the target of a huster, hitman, or the like.
The slang terms I'm familiar with are: P.I. Private Eye, Peeper and Dick
There aren't slang terms for people's names.
does a Finn in slang money terms mean "five"?
The original punter was someone who 'poled' a flat bottom boat for relaxation on English rivers. After WW2 it was a Cockney slang word for people with money to be fleeced. -In American terms, -a 'mark'
pansy, girl, wuss
You need to learn the slang terms in order to use them.
The slang terms I'm familiar with are: P.I. Private Eye, Peeper and Dick
Restroom IS a slang term. Click on the related question
There aren't slang terms for people's names.
One will find that there is no slang term for brake lines, as they are not referred to in another way. There are many other slang terms for street etiquette, but there is not a slang therm for 'brake line' currently.
does a Finn in slang money terms mean "five"?
Here are some slang terms for potatoes:SpudsTatersMurphyTots
To fight. As in, get ready to rumble.
"Victuals" IS slang -- it means food. Other slang terms for food include grub, chow, and eats.
firebug
Cool.
fine