Definitions by Xacutti, Shotgun

Uppenheimer 

When a person or people with names starting with Up ( eg: Upasana, Upam, Upjeet) gets angry at you and is about to explode, obliterating you in the process.

Please don't drop an Uppenheimer on me. Feel the wrath of The Uppenheimer.

Uppenheimer by Xacutti, Shotgun November 6, 2023