When something or someone appears appealing on the outside, but once you "bite in", you realize there is nothing of worth.
Mike: hey man, how did your date with that girl go last night?
Dave: she was attractive and all, but she couldn't hold a conversation for shit, and when she did talk it was just very dry and boring... she was a real cardboard hot pocket...
Dave: she was attractive and all, but she couldn't hold a conversation for shit, and when she did talk it was just very dry and boring... she was a real cardboard hot pocket...
by Flyeaglesfly1738 July 20, 2019

by Just a epic weeb February 2, 2020

Whenever some is acting like a king/boss of someone or others with no reason or right of the ownership of their power. Cardboard since it has no meaning and just a fake version of its original state.
Guy 1: Dude why are we always forced to follow his rules?!
Guy 2: Thats it. It's time to show him that his "Cardboard Throne" means nothing.
Guy 2: Thats it. It's time to show him that his "Cardboard Throne" means nothing.
by AgentReaps January 25, 2023

A way to describe something that flopped/failed to make any money. The reverse version of triple platinum.
“I’m proudly announcing Creator Clash 3!”
“What the fuck? Why did you do another one if the last one went triple cardboard?”
“What the fuck? Why did you do another one if the last one went triple cardboard?”
by waterpark37 April 29, 2025

Someone who is completely obsessed with cardboard and uses it as much as humanly possible, even going to the lengths of stealing cardboard just to get more of it.
"Did you hear what Jennie did?"
"No, what did she do?"
"I heard she stole cardboard from her neighbor, what a Cardboard Slut."
"No, what did she do?"
"I heard she stole cardboard from her neighbor, what a Cardboard Slut."
by Leonardo da Bakugou May 17, 2020

A disorder in which the patient is jealous of his or her bestfriend's newly found love. The patient is being ignored or feels replaced/less important than the bestfriends new partner.
My bestfriend got a new boyfriend, and I feel less important, therefore I have Lettuce Cardboard Cannibal Disorder.
by AstronautPorkChop March 19, 2010
