A person who is used to do something illegal or bad knowing they will get caught
usually in prison or jail a gang leader would send said person on a suicide mission

(noun) A successful type of theft which results in an acceptable, impressive and rewarding payday for the protagonist.

A gullible person who is conned or manipulated into performing an act so that the person who is doing the manipulating obtains his/her goal or action without putting themselves in any danger or fear of reprisal.