Mouse 1 warrior
When in a shooter game, the "mouse 1 warrior" is a player who only holds mouse one (fire button) and sprays at you
Fortnite:
Player with LMG: *constantly spraying you*
Bob: This dude is a mouse 1 warrior!!!!!
Player with LMG: *constantly spraying you*
Bob: This dude is a mouse 1 warrior!!!!!