Psychological syndrome where you buy things you've never used, will never use or never use the amount you purchased before it goes bad but are completely happy about it.
"Why are you doing a new room addition?" "It is for the new spice rack because the 4 pound curry and turmeric jars I bought while suffering from Costco Syndrome won't fit in my kitchen. If I ever start enjoying the taste of either of those spices it will be great, got them at a phenomenal price!"
by T Giraffe December 20, 2018

Eating 1 chicken bake, 1 slice of pizza, 1 churro, 1 sundae, and a bowl of chili from Costco in one sitting.
by IfGodWasAFruit June 13, 2019

That getup is very Costcocore! Great Newbalances bro
Ew, what are you wearing? That's so Costcocore
Trying to be a spy? Dress Costco-core and be fully incognito
Ew, what are you wearing? That's so Costcocore
Trying to be a spy? Dress Costco-core and be fully incognito
by anarchism` March 25, 2024
