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1.
The act of placing and sliding ones freshly ejaculated penis on the surface of a persons face or body, leaving a track of sticky juices.
Dude Sea, T'mac, Matt, and Houston just slug tracked you.
by Kush Kingz 420 April 04, 2010
 
2.
What whores leave on your local bar or tavern.
Christy, I saw you all druck and horny leaving your "slug tracks" all over the bar.
by T.J. Shillingsford Jr. November 17, 2003