Top definition
Having sexual intercourse with an animal that you are related to
Bob: Hey, who is that hot dog Billy is with?

Jake: That's his sister.

Bob: Serious zoocest going on.
by axle_j September 04, 2009
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug