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.
Person A: What's up you siclid?
Person B: Not much, siclid, how about you?
Person A: Are you shooting for birdie right now? I hope you miss, you siclid.