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Dried, crusted semen that has flaked off into smaller pieces.
The sheets in the hotel room were littered with cum crumbs.
by The Captain Awesome October 10, 2007
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The stuff left over in your cum sock after you use it.
Girl: I'm cold.
Guy: Go grab some socks.
Girl: Ew! What's in this one?
Guy: Oh those are cum crumbs, that's my cum sock.
by BigDumpling January 16, 2018
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Mixing warm water with cum, resulting in a coagulated mass that resembles crumbs.
Look! I made cumcrumbs in the shower!
by Laroo July 03, 2013
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