a toothbrush used to clean dirty mouths that are filled will cum. Primarily used after a sorority girl takes a cum shot in her mouth after oral or vaginal sex.
Caroline, go use your cumbrush! Your breath stinks.
by kingmingtingfingdingdong April 4, 2011
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When a guy cums on a girl's teeth and then rubs his dick on her teeth. The cum acting as the toothpaste and the dick acting as the toothbrush.
Jake was cumbrushing Sally last weekend, and now Sally has shiny white teeth
by GigantorMaxypad October 3, 2009
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