Collector's anxiety 

A sentence commonly used by a twitch streamer called Pointcrow, in which he refers to the anxiety of wanting to collect everything possible. It was first used in his first YouTube video and in one of his early twitch streams, it is now used to playfully ridicule him in stream chat or comments.

“Hey guys, PointCrow here. Do you ever get collector's anxiety?”

Collector's anxiety by alumpypumpkin July 2, 2020

collector's dozen 

A group of 11, usually a packaged food item or actual collection of interesting object.

The collector collects a dozen of said item, but is disillusioned by greed and decides to keep one. Antonym for 'Baker's Dozen' as in, the baker is generous and gives an extra, while the Collector's Dozen means 'to keep a portion of the lot' instead.

Hot Pocket Lover: "Man, the value pack boxes used to come with a dozen hot pockets, and now they only have 11!
Friend: "Oh yeah man, the Collector's Dozen. It's been getting more and more common nowadays."
Hot Pocket Lover: "Awh, what ever happened to the generous Baker's Dozen!"

collector's dozen by Karla Mercedes October 14, 2011

collector’s fever 

the state of mind in which one is compelled to collect a certain category of objects (e.x. game consoles, books, etc), and will dig through old things to find random objects ti add to their collection

Joey caught a bad case of collector’s fever, recently he asked me if he could dig through my old games.

collector’s fever by Phoenix the primagen September 4, 2022

Collector's Curse 

Collector's Curse is the strange situation where someone will buy large quantities of random items (cloth dolls, physical game bundles, pop figures, etc.) in a sporadic shopping spree. This is usually done by said person in hopes that, one day during their lifetime, said objects will be worth a fortune.

Similar to:
Hoarder
Scavenger

Randal bought out all of Wal-Mart's fish tank decorations. I think he may have the Collector's Curse

Collector's Curse by Charnime October 25, 2023

Tim's Collection 

The collection and distribution of what can only be an estimated number in the thousands of Tim Hortons cups that reached out to cover much of the garage storage space. The exact number will never be known but it can be assured this collection was due to the hard work of many. Literally thousand of dollars were 'poured into' or 'pissed out of' this venture.

Ed: I knocked it over. Its spilling what the fuck?
Code: Musta been foug's there's still hot chocolate in it.
A: Figures

Tim's Collection by foug January 12, 2005

Copper's Hentai Collection 

coppers hentai collection is unmatched in numbers, no one can compete with the hundreds of thousands of terabytes of pure, slightly illegal, HENTAI FOLDER

all of which is stored in one folder on his sh1tty phone

"yo, do you know if copper's hentai collection is up for sale yet?"
"no"

Copper's Hentai Collection by SUPERIORMF March 27, 2022

Sperm collector

A woman who insists on having condom free sex.

Yeah, I know that Taylor's a sperm collector, but I don't have to worry about getting her pregnant. I've already been snipped!

Sperm collector by Chad Apollo December 14, 2017