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also known as a slut. coming from the two words.

1.Cum - the sticky semen that you ejaculate from your penis
2.Bin - a place to store rubbish or semen in this case
urgh that dirty cumbin Meena has had everyone in croydin. i wouldnt touch her with a bargepole
by dox89 October 04, 2006
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When you and your mates go to the bin for a chat and to put your rubbish in the bin, e.g Oi Fanning cum bin
by Occasionally plays 1s May 24, 2017
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