A person who appears normal on the outside—sometimes even charming—but beneath the surface is emotionally decayed, morally bankrupt, and entirely hollow. Often manipulative, selfish, and abusive, they wear the appearance of humanity but lack all the qualities that make someone truly human: empathy, accountability, and emotional depth.

Used to describe:

Narcissists

Emotional abusers

Pathological liars

People who destroy others while playing the victim
“He’ll smile in your face, cry on command, and then destroy your life while blaming you for bleeding. Classic rotting core in a human costume.”

“She acted like a supportive friend until the moment I crumbled—then used every secret I ever shared against me. That’s not a person. That’s a rotting core in a human costume.”

“He says all the right words about mental health and healing, but he doesn’t believe in either—he just wants control. He’s nothing but a rotting core in a human costume.”

"He volunteers at a soup kitchen, cheats on his wife, lies to his kids, and hasn’t worked in years—but still walks around like he’s the second coming. He’s not a man. He’s a rotting core in a human costume."
by Roxx Farron June 09, 2025
Get the Rotting Core in a Human Costume mug.

Costume Castle

A retail store themed like a Castle in Lake Forest, CA. Orange County's best Halloween costume store.
Did you get your Halloween costume at Costume Castle? No, I got my cosplay costume from www.thecostumecastle.com
by WhoDatKingYo August 16, 2018
Get the Costume Castle mug.

Whiskey and Coke Costume

A costume choice made popular by the swinging community in the late 90’s. The couple who arrives wearing this is meant to indicate to other swinging couples that their preference in the bedroom is anal sex. The person who wears the whiskey outfit is said to prefer to receive, where the cola wearer prefers to give. There are several variations of this costume since the 90’s, including Jack & Coke, Jack & Ginger, Whiskey & Cola.
Oh my! Can you believe Mark and Karen showed up in a Whiskey and Coke Costume? Do you think they know what it means?”
“Oh, I bet Mark knows what it means!”
by Bobby Butt Stuff October 16, 2021
Get the Whiskey and Coke Costume mug.

[cock costume]

Someone who is an idiot. It was said after someone called me an ass hat. They deserved it because they are a cock costume.
You are such a cock costume for using the word ass hat.
by casemaster September 04, 2008
Get the [cock costume] mug.

adopted fortnite costume

Adopted fortnite costume is a derogatory way of saying that you don’t belong, or that you are out of style. It is a very popular phrase in gaming, but don’t get hurt if someone calls you an adopted fortnite costume because the person saying it is typically just as bad as the victim.
Kid you’re such an adopted fortnite costume!”
by Rainer August 29, 2021
Get the adopted fortnite costume mug.

ghost costume

"My man gave me a GHOST COSTUME when he got back from Thanksgiving!"

"Nice!"
by froodley November 29, 2011
Get the ghost costume mug.