Shit's rough, man (whenever someone tells me about a situation in which their shit could, in fact, be rough man:
A: Christ, I have to go study for my Poli Sci test.
B: Shit's rough, man.)
Fo sho (if something is absolute, unquestionable truth "I'm gonna ace this test fo sho.")
That's about it, really.
EDIT: I actually wasn't going to post either these, because I figured I would just get quoted and have someone tell me how annoying this is. Then I realized that all catch phrases are insanely annoying, so it's irrelevant.