look up any word, like sex:
 
3.
A person who spends most of there time preaching religious words on the internet. Much like a keyboard warrior, but fight for god on the internet.
GodLov3sYou: There is NO hate in God. God is LOVE.

Loldogzx: STFU and GTFO you keyboard crusader
by O-DOGGIES July 12, 2012
 
1.
A person who spends hours on the internet(mostly YouTube) everyday, trying to sway the minds of anonymous people by posting politically or socially based propaganda, because they are incapable of debating in person. In other words: a mentally unstable person, with far too much time on their hands.
" Man I can't stand that guy. He is always trolling the same videos posting the same rhetoric day in, day out."

" Aw, forget about him, he's a fucking keyboard crusader."
by Tough actin Tinactin January 24, 2012
 
2.
The leveling up of trolls from Keyboard Warrior to Keyboard Crusader in one troll attempt. It is as difficult to do, as it is to kill 2 stones with one bird.
"Yo man, Arthur one time trolled someone. He leveled up from keyboard warrior to keyboard crusader!"
"NO WAY MAN!"
by KeyboardCrusader October 29, 2009