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Noun, female) a disgusting woman that is encountered in dive bars who is semi to moderately attractive, but is married with children and still goes home with you. Usually these species have a gin-soaked, chain smoker voice, and have names like Rhonda,for example, which they shorten to "Ronnie" etc. They leave their husband and kids in the hotel room on vacation, and go out on the town solo, having sex with other partners in bathrooms, on piers by the beach, or in public parks after hours of daylight. After these encounters, they cling to their new sexual partner like a barnacle clings to the hull of a boat, and the only way to remove barnacles is with extreme effort using a plastic putty knife. They are very hard to get rid of.

(noun male) a shit- bag. An under performer, or complete degenerate. A failure in all aspects of life.
I thought I would never get rid of that mollusk from last night!
by Scoopalone June 01, 2014
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A sand-dwelling creature, that according to Ween emulates the ocean sound, speaks of the trinity, and casts a light at the sand with its wandering eye.
There are three things that separate the mollusk from the sand: the waking of all creatures that live on the land, and with just one faint glance back into the sea, the mollusk lingers with its wandering eye.
by Runaway Jim June 05, 2005
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