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When girls wear extremely short shorts (or Daisy Dukes) and their ass cheeks peek out.
They don't stick out, ..they peek out (peek-a-boo)
"Hey buddy, did you see those cheek-a-boo's?"
"Yeah man, that girl has a nice ass!"
by Dan James April 22, 2007
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2
This is when the bottom part of a girls (or this day in age guys) butt cheeks are sticking out of their shorts.
Look at that girl yo. Her booty is playing cheekaboo with those shorts.
by MisterMikeH April 22, 2016
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