A wet, flaccid penis, usually after it's been freshly removed from a vagina, mouth, or rectum; thus resembling a slimy little slug. Can be the cause or consequence of ending sex.
(May also be used in verb form - see below)
Example 1:
To everyone's horror, Chris walked out of the bedroom naked with a satisfied expression and an exposed banana slug.

Example 2:
"I wouldn't have stopped pounding her yet, but my drunk was wearing off and I was pretty much banana slugging it by that point."
by bslug February 4, 2010
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wow. how embarrassing. I misspelled secretes. my bad.
A banana slug SECRETED her glue-like slime onto a leaf while we were walking through the forest. Then we estivated together in a log.
by Martin Luther King Jr. January 19, 2008
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Our code word to know if one of us were falling in love was banana slugs so when she played piano I replied with “banana slugs”
by Yikes yikes April 22, 2018
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A lesbian, a woman who engages in homosexual activities, one who admires lesbians, or a heterosexual woman who secrets a glue-like slime.
That homosexual woman is a banana slug. I wonder if she estivates?
by Martin Luther King Jr. January 16, 2008
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someone who participates in the act of coitus interruptus with total disregard for clothing and furniture, typically resulting in some type of stain resembling a banana slug trail, often the perpetrator is hard to uncover, thus dubbing them a bandit.
ex 1
man 1: dude whats that on your shirt?

man 2: oh shit!!!

man 1: dude, you shoulda changed before you went out today

ex 2
Jeff: you don't want to sit on that couch, the banana slug bandit struck last night!
by 1armwonder March 22, 2010
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A colloquial term for a Union Pacific Maintenance of Way train.
We were trying to get some work done today, but that banana slug gummed up the railroad.
by D.Bambowski November 5, 2021
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He pressed his naked dick against the store front window, giving the crowd a full banana slug.
by EDubs June 8, 2020
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