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A nonsensical word that can be used as either a verb, adjective, noun or almost anything else. Usually accompanied by various pictures of cats copulating. If anyone knows more about the origin of this odd word, I encourage them to write a better definition.
"That meal we had was catsex."

"You're an idiot."
"Catsex!"
catsex by C4753X May 8, 2005
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Short for cat's pajamas, it basically means something very good. Synonym of the bomb diggity.
Jimmy really thought he was the cat's PJs after he landed that big job in can assembly while Will and I were still stuck working as bean counters like we had been the last 15 years.
cat's PJs by Nick D July 8, 2004
Related Words

Beating Cat's Heart 

Ask an unsuspecting victim if they have seen a 'beating cat's heart', followed by exposing one's testicles and pumping in and out of one's fist to mimic a beating heart.
Jeffrey: Hey William! Have you ever seen a Beating Cat's Heart?
William: I don't believe I have Jeffrey, please enlighten me!
Another word used to give the same meaning as "bullshit"
Hunter: I just got laid while playing Black Ops!!
Colin: What?! That's catshit! I don't believe you.
catshit by Shremco January 20, 2011

latex catsuits 

a latex catsuit is a skin tight "usually black colored" shiny from ankle to wrist zippered bodysuit usually worn by women
britney spears was wearing a red latex catsuits in her 2000 music video "Oops i did it again"
latex catsuits by Joe Smith 2 August 7, 2007

CatsWithSMGS 

CatsWithSMGS is a Funny twitch Streamer Known for play Fallout and Naruto!
Guy 1: Yo what you watching?

Guy 2: CatsWithSMGS he’s pretty Funny!

Guy 1: Oh that one guy who plays Naruto
CatsWithSMGS by Zombiekilla678 December 20, 2020

catssgang 

A really cool tiktoker who makes videos about her cat and more
Girl: hey have you heard of catssgang?
Other: No i haven't what's that?
Girl: You should watch them there's a tiktoker
Other: thanks lemme go watch her!
catssgang by SnapperTV May 6, 2021