When you're about to knock somebody out or punch someone
Da'Jon: "I'm finna crunch his dumbass"
Combining and compressing many files together
I'll crunch the files and send it out
to beat the absolute hell out of
Josh: omg did you see the fight between Zack and Nick
Pam: omg right Nick totally got crunched!
Josh: he never had a chance against Zack
Your dad has brought up 20 times since you were in the eighth grade that he used to say this in place of "what those kids today call roastinng"
you (in 2015): roasted!
your father (having materialized behind you): back in my day we used to say crunched instead.
Crunch is used when someone looks good or is attractive. Crunch as in you could just eat them up.
"He's so crunchy." "Do you know who S.coups is? He's crunch."