1) An elite group of trained assasins that take on various missions.
2) An action or set of actions that are performed in a tatctical yet badass fashion which result in a) severe bodily harm, or b) large amount of collateral damage.
Bad Guy 1: Holy shit, is that Unit 13?
Bad Guy 2: Hell yes! We better get the fuck out of here.
Bystander 1: Wow did you see that merc Unit 13 all those tangos?
What I call homo-sapiens who are addicted to perianal abscesses.
Person 1: Are you addicted to perianal abscesses?
Person 2: Yes.
Person 1: Joel McKinnon Miller 《Super Android 13》: The First Juvenile Release.