Flying Flagella

A phrase you proclaim when you are excited and/or upset about a certain thing. Flagella is a bacterial, slender threadlike structure, like a spermatozoa. Replacement phrase for fuck.

Dude 1: Dude, your girlfriend is pregnant.

Dude 2: HOLY FLYING FLAGELLA
I THOUGHT I WAS GAY
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Dude 1: Dude, I'm pregnant.
Dude 2: HOLY FLYING FLAGELLA DUDE