Definitions by A. K.

SIYM

stands for Satan Is Your Master, common phrase uttered in your ear to sound like youre a psycho. Also combined with KYSF.

(sneak up behind someone): SIYM Satan is your master, KYSF kill yourself fag!

(victim): fucking shit im going insane, gotta slash my wrists to release the pain!

(fuck yes)

SIYM by A. K. December 8, 2006

KYSF 

Kill Your Self Fag, whispered in people's ears to make em think they're going ape shit.

(sneak up on someone): KYSF kill yourself fag, fucking die!

(victim): AHAHHGRHHHA THE VOICES WON'T STOP!!

KYSF by A. K. December 8, 2006