-a phrase often used to emphasize the meaning that something is about it happen.
-when you wanna ryhme with 'it's goin' down'
girl: we have to go to the party at becca's this friday
boy: oh hell yea, bro. it's goin down like china town
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boyfriend: babe, am i seeing you in your birthday suit tonight?
girlfriend: oh baby, you know it's goin down like china town
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boy 1: it's on like donkey kong ?
boy 2: it's goin' down like china town