Flacidia

A girl who has the power to make any penis immediately flaccid.

I was going hard and then that Flacidia popped into my head and it was over.

by Drygina August 12, 2016

INSTANT FLACIDITY

When your dong is suddenly gone because you were trying to have sex with your sister then your girlfriend walked in. (That word is only a valid word in cases exactly like this)

I was tryna fuck my sister, but bae walked in and my dick got scared so it let out a loud shout saying "INSTANT FLACIDITY!!!" Which of course activated the power to retract immediately so as to flee a dangerous situation

by YouDontKnoMe_ September 10, 2019