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1.
A technique used by bad gamers using only the W key and holding down Mouse 1. They charge in sort of a rambo/scarface fashion to enemies, only to die.
(Team Fortress 2)
Scout: God, I hate those W+M1 Pyros, such a nuissance
Pyro: NaW dood teh are teh awesomz!!11! skill ftw lulz
by Hydro2Oxide November 10, 2008
 
2.
A technique used by games involving rushing in and shooting the enemies without any thoughts to tactics or strafing, by use of holding down the W key (in a WASD configuration) and the left mouse button. Expression originated from Team Fortress 2
"God, I hate those W+M1 Pyros, they have no skill!"
"W+M1 wins again!"
"I can't believe I died to a W+M1."
"W+M1 takes no skill."
by Mangr0v3 May 19, 2009
 
3.
A way pro gamer's play a game.
Holding Mouse 1 (left click) while holding W on the keyboard.

Makes most nerds rage. :D
It's our W+M1SSION to rek u nerd
by swegnemite :D May 25, 2014
 
4.
The favorite tactic of all the Pyro players on Team Fortress 2.
Be careful when you encounter a Pyro in Team Fortress 2, he may W+M1 you to death.
by FlareKitsune November 05, 2009