To work out, especially to lift weights.
Mostly a California bro expression, brought into the public eye by Will Ferrell in "A Night at the Roxbury".
Doug: So...I guess we're on a break from work.
Steve: Uh, yeah, looks like it....
Doug: Wanna crunch it?
Steve nods purposefully and the two men strut off.
to be a major tool, fag, queer
a cruncher is a person who wears hair gel cut off tshirts and flatbilled hats on backwords, and can always be found wearing oversized glasses.
brent, look at that cruncher, what a faggot. he thinks he's crunching but he's just gay.
A crunch may be referred to the act of masturbation or wanking
Boy1: that girl is fit
Boy2: i may just have to go crunch over her
Eating lunch w/ some people in conjunction w/ getting wasted.
Hence, Crunk Lunch
I went over to John's house for some crunch.
To get crunked around lunch time
theres a rough crunching seshion going down at fuell's....bbq with a side of keg stands.