The act of removing a cunt from your facebook account.

People often go through their friend list periodically, removing people that they no longer have contact with. However, decunting is only done when a particular friend's updates and self-promotions become so annoying that you can no longer stand hearing about them. Decunting may take place after realising that a particular Facebook friend is homophobic, sexist or racist, judging by an offensive status they have just posted.
This is an example of decunting:

Status update: "James Brown hates fags". "James Brown loves Tony Abbott". "James Brown says "Australia, love it or leave it". "James Brown hates boat people".

I better decunt my Facebook by removing James Brown as my friend. I never realised what a horrible cunt he was until now.
by Lizzie Birdsworth November 11, 2011
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to remove the penis from the (someone's)vagina
this is a regular verb
a) Jeremy decunted and answered the phone.
b) I would never decunt Molly if I could remain there forever.
by Sérgio Roberto de Souza January 31, 2004
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The act of spring cleaning ones social media to remove unwanted friends and contacts.

Based on the principles of Marie Kondo.
"Sorry I didn't reply earlier Patsy, I was busy decuntering LinkedIn and I'm back down to 400 contacts now."
"Jesus, my Insta is getting full of shite, time for a bit of decuntering"
by CJ OMOS March 9, 2019
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