A person who is trying to scam you for cash (not a "thief" who will just take the money, or "scam artist" who is trying to scam you out of more than money), usually in a setting involving a transaction that would normally be no big deal

A jack off buddy (from 'cum' /'come', meaning 'semen', and 'companion'); a friend that you get together with for sessions of solo or mutual masturbation
Variant of: cumpanion (from 'companion' & 'cum'); jack off buddy & wank bud & JO buddy
Similar to: fuck buddy

Dublin slang for a child

The ground squirrel. Terminology comes from Wyoming cowboys.