Top Definition
A synonym for bipolar disorder;

A mental health condition defined by periods of extreme, often inappropriate, and sometimes unpredictable mood states.

1. I think Sally suffers from Happy Happy-Not Not Disease--10 minutes ago she was threatening to kill herself, but now she's laughing and having fun.

2. You will contract Happy Happy-Not Not Disease and die.
by malchik_gei March 22, 2007

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