Definitionen
1.NounAny dog bred, trained or used for the purpose of attacking a target, either on command or on sight; trained either as a specialized form of police dog or a security force dog.
2.NounA dog used in the bloodsport of dogfighting.
3.NounA person who engages in rhetorical attacks on behalf of another.
4.NounA person or other entity who fights physically on behalf of another.