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A large duck beak shaped penis, most are uncircumcised. Most people with bumbacocks are social outcasts, as people can easily see an erected bumbacock. it looks like a hockey stick in someoneโ€™s pants. They are almost always only one inch out, but 6 inches tall.

Originating from the Greek word BUMBA, which means, to cock.
Woah alex, did you get a look at ralphs bumbacock?
by Casedro October 15, 2007
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