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Lacking firmness, resilience, or muscle tone.

See Synonyms at limp.
Lacking vigor or energy: flaccid management.

lacking normal or youthful firmness

adj 1: lacking in strength or firmness or resilience; "flaccid muscles"; "took his lax hand in hers"; "gave a limp handshake"; "a limp gesture as if waving away all desire to know" G.K.Chesterton; "a slack grip" syn: lax, limp, slack 2: lacking firmness or stiffness; "flabby around the middle"; "flaccid cheeks" syn: flabby
He had gone flaccid so we couldnt have sex.
flaccid by noone February 2, 2005
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A term used for 'cool' or 'Awesome'. Other words like 'Rad', 'Dank', 'Dope', etc. This term is only used by the coolest people.
Steven: Hey I didn't go to homecoming, did you want to come over?
Jon: Sure. Why didn't you go?
Steven: Some people told me it wasn't flaccid so I didn't go.

or

James: Dude you kissed my girlfriend, that wasn't very flaccid of you.
Flaccid by lonerdeboner October 8, 2014
flaccid is how a guy's dick gets when someone thumps his nuts with their thumb and index finger while he's jacking off, resulting in a failed orgasm
Matt thumped my nuts as I was about to cum, and my hard dick got flaccid!
flaccid by USAF Cadet October 19, 2020
Floppy, or limp. like an old lettuce leaf.
Crikey Charley! That lettuce is as flaccid as your ex-boyfriend!
Flaccid by LukeWw July 12, 2022
The state of letting loose and being abnormally turnt up. Being limp, like a wet noodle.
"Did you see Stacy's moves on the dance floor? She was so fucking flaccid man!"

"I'm getting so flaccid tonight!!"

"Let's get flaccid!"

"I realized I was really flaccid last night when I hooked up with seven guys"
Flaccid by Flaccidwiener October 7, 2014
This is the point of being so fucked up that you can no longer get your penis erect. Generally a term used by a group of friends when they are partying together.
*Calls right hand* "Yo get the squad together, we're getting flaccid as fuck tonight."
Flaccid by hugs4drugs October 8, 2015