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1) A penis resembling a South Pacific starchy tuberous root.
2) A penis you can eat with brown sugar and butter (or marshmallows if you're sick like that.)
3) A man with such penis.
1) Woah, I haven't seen a yamcock like that since the seventies!
2) I have the brown sugar, did you bring that yamcock?
3) That yamcock fucked up my Razor scooter!
by Arr September 17, 2007
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