Verb: Sice is like slice, except for it's sice. Often yelled while playing Call of Duty and using the melee attack to kill an opposing player.
Adjective: used to display great excitment or approval of nearly uncontainable joy.
Related words: throwing sice, shooting sice
Guy #1 kills opposing Call of Duty player with knife attack
Guy #2: Sice!
Guy #1: What does sice mean?
Guy #2: Sice is like slice except for its sice!
Mon, I had Marathon, Lightweight and Commando on and I was sicing guys all night!
To conduct a knife attack on an opponent or team mate while playing Call Of Duty.
When your opponent dies from a knife attack you would scream "SICE" into the headset so you team mates would know.
Throwing knives are also sice-worthy.
"Yo guy, I'm about to sice the sniper camping at the top of the hill". as I walk over to his position, i maneuver my way behind him and then, "SICE" !!!