When the bottom of a girl's boob is hanging out from under a woman's top.
Did you see that chick at the club showing her boob-crack
the cleavage spilling out of a girl's shirt.
Mya Braztoosmal: Um, what are you staring at? My eyes up here kid.
Kid: Oh, I was just staring at your boob crack.
Basically just cleaveage. like a buttcrack only in the front and on your chest formed from 2 large boobs pressed together.
"A slippery coconut noodle just slid down my boob crack!"
"wow, she is showing a lot of boob crack"
"my dang titties are too small for me to have a boob crack"
person a: what are you staring at?
person b: your amazing boob crack!
Boob crack: a great place to carry a cell phone.
-like space between either two womanboobs or manboob
s. Very hard for straight men to not stare at if prominent. See: cleavage
The space between two boobs. Has the potential to look like an asscrack.
It looks really trashy when you get a tattoo in your boobcrack.