look up any word, like bukkake:
An underage girl who you can tell is going to be very attractive when she gets older. Like a bottle of wine you would put in a cellar to age until it is drinkable.
Woah, that girl is going to be hot when she get's older! She's a definite Cellar Girl.
by thirdhouston January 09, 2008
an unfortunate girl that is kidnapped and held captive in a cellar, basement, or otherwise imprisoned and used for the sexual gratification of her captor.
"Damn, i've gotta get me a cellargirl like those Austrian guys...they've got it made!"
by ElixirOfEvil September 03, 2008