Top definition
during anal sex the male counterpart ejaculates into the second parties anal cavity and proceeds to extract said load by means of the mouth (straw optional) achieving a "snowball effect".The fecal matter of said "snowball" gives it a dirty appearance which likens it to the dirty nature of Detroits snow.
Hey Carl remember the time i Detroit Snowballed your mom?
by The Trippsterrrr May 08, 2009
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