1.When a man cums in another mans ass, and then it drys and is crusty, later the man who came in said ass licks the dried cum out

2.Someone who is or has the qualitys of a bum cheeser.
gay guy 1-"We totally bum cheese 69'd last night"
gay guy 2-"and it was tasty, yum"
by bumman August 23, 2006
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