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1.
A bitchy ass girl who is mean to everyone. The term comes from the fact that this girl is so cold hearted that there is likely frost on her pum pum
Hey mel, stop yellin already you fuckin frosty box
by John Detlor May 07, 2007
 
2.
(n).
1. A term to define a female with a subzero vagina.
2. A bitch.
3. An ice princess.
That girl is a fucking frostybox.
by That_Penn_State_Guy July 27, 2005