Costcop 

the Costco worker who checks your receipt as you leave

Costcops pretend to confirm what you've bought.

Costcop by Ae5Ea8 February 7, 2015

Costcop 

A costco worker who dreams of being a cop or dresses like a cop.

I didn't expect to see a costcop today.

Costcop by The Killer Burger July 13, 2017

Costcodian

The act of purchasing or consuming more than is needed.

They had to find a larger place to live because of their costcodian lifestyle.

Costcodian by Wishbone1000 December 20, 2014

Costco berry ice cream

What you get at the food counter at Costco. Very very yummy yummy scrumptious and enlightening.

"Dad can I have some Costco berry ice cream?"
"Well I suppose since we're already here..."
"YAAYYY THANKS DAD"
"I love you son"
"I love you too dad"
"Wake up"
"Aw man another dream with my dad. But at least I got some Costco berry ice cream"

Costco berry ice cream by Aim For North May 15, 2022

costco effect

Over purchasing because the price per unit is too attractive to pass up.

Aw, Mike why did you buy three 48-ounce bottles of ketchup? The Costco effect got you. The second two are going to expire before you get to them.

costco effect by aretegroup March 30, 2015

Costconaut 

Slang term for someone who bravely ventures deep into the inner spaces of the Costco Universe in the middle of the COVID-19 Pandemic.

Dad is our designated Costconaut and we appreciate his willingness to go!

Costconaut by Dr Bunnygirl May 7, 2020

Costco Dogging 

Costco Dogging is the act of going to Costco and buying a large $1.50 hotdog and proceeding to throw away the hot dog and sliding your penis into the remaining bun. The participant must fill the urethra with every condiment available and is not allowed to leave Costco until someone sucks all of the condiments out. The act of Costco Dogging typically takes a week or more.

Yo bro I dare you to go Costco dogging, last I heard William was stuck in the Costco for weeks!

Costco Dogging by CostcoDogOfficial April 22, 2019