a tight-ass slang term for "for real?" without the gay use of proper grammar.
This kid: You want some of this sammich?
That kid: forrealz?
A term of complete agreement on something undeniably true. Synonyms: most definitely; for sure; 'like you needed to ask,' etc. Often used by white kids who think they are really cool but are really quite ordinary.
"Dude, that teacher is, like, a complete jerk."