1. The sudden arouse of one's penis.

2. A term loosely used to exaggerate sudden excitement for something.
1. * Stares at a sexy woman.* MAHDIK!!!

2. Brandon so was excited for the release of Jojo's Bizarre Adventure: All Star Battle, he screamed 'Mahdik!' from the top of his lungs.
by Izanagidonutz July 5, 2013
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