No Sweat Sarge

Derived from a "Garfield" comic, a "no sweat sarge" is when in a first person shooter video game, you (with or without your team) feel that you can clutch the game and win with an overly-tactical loadout, strategy, and/or calculated style of gameplay.

Simple definition:
Going ultra-tactical calculated soldier mode.

(In Rainbow Six: Siege) I know exactly where this last guy is. Just watch, imma do a No Sweat Sarge and drop him before he knows what hit him.