A woman's vagina. If you're from Canada you would spell it beef donut... you can try dunking a beef doughnut, but the owner of the beef doughnut may get mad.
Billy walks in on his naked mother in the shower...
Billy points at his others mid section..

Billy - "Mom what's that?"
Mom - "Uhmm, that's where your father hit me with an ax."
Billy = "Nice shot, got you right in the beef doughnut".
by Vicar204 April 17, 2008
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corn beef doughnut - A phrase used to describe ones anus.
"Yea mate, i squirrel gripped her corn beef doughnut good and proper!"
by cgrovesy February 14, 2008
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Keith - "Did you shag that bird last night?"

Wesley - "Yeah mate, right up the corned beef doughnut!"
by Draz1000 October 23, 2007
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