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A condition arising when a male homo sapien engages in sexual relations with another homo sapien (male or female) resulting in ejaculation on or around the ass region.
A. After a hot and steamy romp through my forest, steve smeared his love all over my ass, leaving me with a milky bottom.

B. uhh ohhh yeah uuhh yeah yeah yeAH YEAH YEAH!!! ahahhhahahhhh!! I'm cumming on your ass. im going to lick your milky bottom.
by Tony Mcneil April 10, 2008