A clump of cat urine (often found with one or more sewer pickles) in the plastic cat toliet if a clumping
kitty litter is used. Gets its name from the Krabby Patty, a sandwich made at
the Krusty Krab by
SpongeBob SquarePants because it is often somewhat flattened and patty-shaped.
Note spelling; the Krabby Patty is generally known to be delectable -- you simply would not want to eat a clump of cat potty.