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Questions about some sentences of this SNL video (http://www.hulu.com/watch/793228): 

At 01:11 of this video Louis C.K. said "And your as* better back up, because otherwise you're going to be clowning on this fella." 

And at 01:23 he said "And if you clowning on my mom, then yous about to get bounced."

Also, at 01:52 "I ain't trying to front on no chicken hawk."

Last one is at 04:06 the woman said "they thought I was straight out of Compton."

Please explain these 4 lines.
Thank you.

※video alternative link: https://www.youtube.com/watch?v=t9gSkPjZWEA