Definitions by Señorita Christine

Hook up hippo 

The animal mascot of hooking up or potential hook ups.

Formed by projecting both index fingers from forehead to form hippo ears, and then bending knees.

Person One: Look at Matt and Alyssa, they just kissed.

Person Two: Hook up hippo!!! *does gesture*

Hook up hippo by Señorita Christine March 14, 2009