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Most commonly when a girl's breasts are so tightly squeezed into a dress/shirt that they are ALMOST falling out. Also if the shirt is too low, or doesn't have enough coverage.

Can also be used if the girl's breasts have actually fallen out of the garment.
EXAMPLE #1:

Honey, you might want to readjust your dress, you're popping out.

EXAMPLE #2:

I was so drunk, I was stumbling all over the place, and my shirt was so low I actually popped out of it, and I didn't notice until Karen pointed it out to me!! I was so embarrassed!
by noenemies August 19, 2008
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Jun 18 Word of the Day
Adj. Something that is expected to have a long lifespan by virtue of having existed for a long time, based on the lindy effect, named for the New York restaurant Lindy's, coined by Albert Goldman and popularized by Nassim Taleb.
cooking with fire is lindy
by mmebs June 13, 2021
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2
Giving birth, reproducing, rolling a baby off the conveyor belt.
Not long after having her fourth kid, she was on her way to popping out another one.
by flamingpanties May 06, 2011
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