isdp

Internet shorthand for "I see dead people".
Mostly used to describe a feeling of insanity after playing FPS games for too long.

Player 1: Dude are u OK? u've been playing cs for 8 hours in a row -.-
Player 2: yea... isdp
Player 1: lolz go get a sleep

by MrDavidSmith March 5, 2008