Stalling Off

A. To hit someone when they aren't looking
B. To hit someone without making it aware that you want to fight them
C. To hit someone from a blind side

Kwame: Dang bro, how'd you lose to Kel!?
Jose: He stalled off of me, dude didn't even give me a chance to square up
Kwame: Dude's are STILL stalling off? Wow, I thought you lost fair and square.....Guess not