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To back out of something at the last minute. Similar to "pussy out." Derived from the word "flaccid," and pronounced "flass out." When one flacces out, his flaccing out is compared to his penis going soft right before a critical juncture in a sexual encounter.
Aaron: Hey bro I don't think I can come rage tonight, I'm feeling sick.
Bro: Aw come on man don't flacc out on me.

Chad: Hey dude why wasn't Aaron there last night?
Dude: Bro told me he flacced out at the last minute.
Chad: What a flacchole.
by FightOn&FlaccOut June 03, 2013
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Apr 26 Word of the Day
1. The default beliefs installed when you were a child.

2. An unexamined position you absorbed from your environment growing up.
I grew up in a conservative home so my factory settings lead me to vote Republican.
I grew up in a liberal home so my factory settings lead me to vote Democrat.
by riemannslost0 February 04, 2020
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