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1. fall flat
a ghetto way of saying "shut the fuck up" or stop what ever it is that you're doing wrong
Girl 1: What the fuck are you wearing?
Girl 2: Bitch please, fall flat
2. FALL FLAT
1) To get hit
2) A term used with fall back
1) Yo you about to fall flat son!
2)Fall back or fall flat hoe!
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