Costcotard 

Condition where someone loses their situational awareness and mindlessly blocks the aisle while sampling free food at Costco.

Costco on weekends has too many Costcotards.

Costcotard by Middagh July 20, 2008

costcotarian 

Person who mainly eats food from the magnificent place that is Costco Wholesale.

I’m not a vegetarian, I’m a Costcotarian.

costcotarian by L Kirkland March 7, 2019

Costcocartell 

he got a lot of bot on 2bt2 jp

idk Costcocartell

Costcocartell by poopman6942089678r6 March 15, 2021