name taken from the pleco fish. They suck algae from water.
-It is supposed to discribe someone greedy, sucks in money,eats alot, etc.
there is also "plecostomystice" which is a magical pleco.
Person 1: "My job is so plecostomistic, they won't even let me eat free, or let me have any discounts."
Person 2:"Man that sucks."