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The act of constantly posting on Facebook - checking in places, posting pictures, updating status. Seen most often after a break-up when trying to appear happy and normal. Also common when on vacation.
After she broke up with John, she was so posty, trying to make him jealous.

He was so posty on vacation, we didn't even want to hear about the trip when he got back.
Posty by Lucky#7 July 21, 2013
Related Words
mullet. Post men grow their hair like this so that their necks don't get sun burnt.
Man, check out the posty on that squiff zeph mother fucker!
posty by worm September 19, 2003
british slang for a crazy, insane, or inhibited person.
Bloody fuck, Dan's gone posty!
posty by Daniel1313 December 29, 2006
Being relegated to running around naked with a rock and torch, usually while malding.
I can't seem to get a start today, I'm going full Posty.
Posty by Bauhs May 10, 2021
When you’re at the end of your blunt and it starts falling apart you call it a Posty because Post Malone has the song “I fall apart”
Austin: pass the blunt
Noah: you can try to hit it its a bit of a posty
Posty by Yung rev July 21, 2021
Damn that girl is a Posty hoe.
Posty Hoe by kiana_e October 2, 2019