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.