The reaction of the male genetalia occuring when open hand contact exceeds a duration of longer than a high-five between two guys while performing the Eiffel tower or any other 3 person maneuver.
My flacidity occured when Brad tried to hold my hand while we were fucking Esther.
by esbradjosh April 09, 2010
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A polite term used to describe a dong that is long, floppy, and blood-filled, but dose not stand out and proud like a normal erection
Ever since i was shot in the testy, im unable to get hard, only flacid
by kingfloppymonster March 17, 2005
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When a guy's dick is loose and floppy, the opposite of erect. If you're lucky your boyfriend won't try and slap you in the face with it.
Chip: hahahha, i'm gonna slap you in the face with my flacid penis!!!!

Phillis: haha bet you won't!

Chip: *whacks her in the face*

Phillis: .....did that really just happen
by traelsldffadlsk January 18, 2012
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Gettin' mad soft or limp.
Girls Question: "If I were an ice cream cone, how would you eat me?"
Peter Griffin: "I'd eat you real fast, before I got flacid"
Stacker McRandler: "I'd invite my friend Ronny over, and we'd give you a double dip"
by Johnny McSteampot March 08, 2008
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