Top Definition
When a girl's breast grow at different times so that one boob is bigger than the other.
"Damn, look at the girl, she's got nice boobage."

*girl turns to face forward*

"Oh shit, she's got a hill-chest!!!"

"Hahahahaha, you see some wierd ass chicks here at Hooters!"

"Yeah! Irony's a bitch!"
by Glass Cup April 19, 2010

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