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1.
When a penis is attached to an automatic milking device used on cows. This may seem like a pleasurable experience, however, it is very painful. Abbreviated as M.D.
Tim Hurley, M.D., has wicked milkdick from when he went to the farm the other day.
by The room mate May 15, 2011
 
2.
A small poodle used for ass wiping.
Magen Poster is a milk-dick.
by Nathanial Beddington February 25, 2010