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1.
The act of only partially coming in ones partners ass, then pulling out and releasing the rest on the ass, legs, etc. This will generally include Santorum, thus making this dirty.

This is in reference to how Hitler was to have shot himself while hiding in his bunker.

See also Hitler's Bunker
After having anal sex, the man gave the woman a Dirty Bunker.
by NaughtyGod March 04, 2009