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3.
a bottom feeder.

one who attaches themselves to other peoples environment as to be a part of it, or "in the know".
This was a pretty hot spot until this pleco started coming around.
by CT January 29, 2004
 
1.
Fish that eats scum from the bottom of the tank
Do one you pleco!
by Victoria March 22, 2004
 
2.
1.is used refer to any member of a large family of catfish native to Central and South America that posess sucker shaped mouths that are often introduced to aquariums to eat algae.

2. used to refer to a very low, scummy individual, a "bottom feeder".
1.I had a pleco in my 10G tank, but he outgrew it.

2. that guy is a total pleco, he asked my married sister to do it with him.
by fishcatch22 March 02, 2007