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1.
A box where you keep all your past loads.
Hey mom, have you seen my cum box?
by lunchboxes September 07, 2006
 
2.
A term used to describe a person who is used simply as a deposit for cum, implies total lack of respect
Going home now to empty my bollox in the cumbox
by Anonymous October 19, 2003
 
3.
A promiscuous female with little or no personality
A slut
A woman who often has sex void of any emotion
Jess came over last night to have sex with me and then she left. I dont really like her, shes just a cumbox.
by The Wonderboy August 06, 2005