A worm like creature which dwells in the dark crevices of small bodies of water as well as fish tanks. Also used to define those whom display a general scummy attitude towards others and is often known to scum people out in any way, shape or form. Can be used jokingly or as disrespect; the latter form is often applicable. Can be used towards males and females alike; as well as animals when applicable.
Example A-Jokingly

Person A: What's up you siclid?

Person B: Not much, siclid, how about you?

Example B-Disrespect

Person A: Are you shooting for birdie right now? I hope you miss, you siclid.

Person B: ppreciate that, pal.
by TheManWTMP January 24, 2011

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