Marbling

[Sarah]

During fellatio, the act of placing gonads in your mouth, either for sucking, licking, or gentle tugging.

[Dianne]

The streaks of intramuscular fat found in meat (especially beef) which add to the meats flavor and tenderness. Marbling is a primary factor in determining a meats quality grade.

[Vania]

Coloring or marking that resembles variegated marble.

[Tracie Lynn]

When [dropping a deuce], taking a dump, [dropping the kids off at the pool], etc...the fecal deposit after flushing leaves an artistic swirl of streaks and smudges behind in the bowl resembling sections of [marble].

[Gregory]

Inserting [gonads] into lovers anus, with your [thum] and forefinger, like flicking a [marble]. Definition one is teabagging!

[Vania]

a way of decorating something such as paper or wood with a pattern that looks like marble