When you're playing a war game, and you suddenly are hit, it is common to say "omgmissile". This became adapted just to be said in general online chat, and is often shortened to omgmsl, which is mistaken for omgmisled.
by sugarrmouse September 03, 2008
An addon for Garry's Mod. Consists of a bullet floating over the player's left index finger. The player fires this weapon by pointing to where the bullet should go. When hit, an NPC flies straight up into the air, and explodes shortly after.
by ThePotato June 13, 2011