Top Definition
A heart infection with side effects of deep love and emotions for a girl named Jenny.

Symptoms may include: catching yourself thinking about Jenny, butterflies, daydreaming about Jenny, Feeling a rush of happiness when Jenny is in your presence.
Dude 1: Look at that guy.. he's totally checking Jenny out.
Dude 2: Yeah.. i've heard he was diagnosed with a serious case of Jennitis. You cant blame him it's very contagious
by <3<3<3<3<3<3<3<3 May 25, 2014

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