The moist secretions left by female anatomy after it has been heavily aroused or after having been filled with
ejaculate.
Typically a slugtrail is created by a woman after pulling off her man after a good ride. The female typically rests her pudenda upon the man's belly, slides
back and forth, and create a slugtrail.
Also used to refer to any wetness created after said ride on the sheets.
It can also be used as a gerund (slugtrailing). Typically used by skanky girls to refer to one anothers' feelings about an
attractive male. See second example.