A sex act performed by an active gay man on a passive gay man, in which the active partner penetrates the anus of his partner until he ejaculates. The active partner then removes some of his semen from the anus and coats the other man's lips and tongue.
My gay friend refuses to participate in a dirty baumgartner, because he does not like the taste of cum.
by wigzilla August 20, 2009
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