It means a system meant to privilege only those who pay.
This can also include systems that are made to ruin the experience of free users deliberately to impose the supremacy of the wallet.

It's commonly called pay-to-win at massive multiplayer online games.
Dude, you've spent like 400 bucks on this game so you can beat everyone who hasn't spent any money. Walletism at its finest!
by Samurai Pizza Cat December 14, 2015
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An action which implies that you drink any type of alcohol which has been poured onto your friend's balls before consuming.
"Oy Calum ye fat cunt!"
"What the fuck is up with you James you naughty twat?"
"If you call me a naughty twat again Calum, I'll fucking make ye drink from the wallet I swear on me mum"
by Calum McWalletson January 13, 2016
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When someone tries to help you out for free with no strings attached (like finding a wallet in a restroom)
Rob was looking for a job so I attempted to extend a toilet room wallet by telling him my job was hiring
by CouncilmanJR February 21, 2022
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A person or business that goes back and forth on ripping other people off.
That Vet is very Wallet Fluid becuase they always change their prices on pet care.
by jondich February 11, 2023
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The action of cumming inside someone's wallet.
"did you and Nick have sex last night"

"Ya he Wallace walleted me"
"No way!"
by Molly the Meme Man March 12, 2018
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1. A female who has had sex with the same woman as a good friend. (not necessarily simultaneously)

2. When two females acknowledge having been intimate with the same male and remain on good terms, the girls are now bonded by having shared the same penis at one time or another.

3. Refers to two women who have slept with the same man.
Girl 1 "Holy shit, you slept with that guy rolando too?"
Girl 2 "Yes, but he told me i was his only one"
Girl 1 "Fuuuuuuuuuuuuuckit, were wallet sisters now"
Girl 2 "Ewwwwww! Wanna go shopping?"
Girl 1 "Like, totally"
by _RollOnDough January 20, 2012
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A polite informal name for one’s scrotum sack
Ian‘s Bollock wallet looked like a shaved baby bird
by PContheGC October 27, 2021
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