Top definition
When you combine the words Insane and Unstable, you get instane for short.
Insane + Unstable = Instane
That guy is completely Instane.
by Puma October 19, 2004
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