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1. Needing to go to the toilet.

2. The sound your piss makes when it's aimed into the toilet perfectly; also like a Swish in basketball.
"I need to spleesh"

"BRB I just need to spleesh"
Spleesh by Jack Patros October 7, 2008
Related Words

spleesh! 

Exclamation often used by Amy on Futurama to express disgust, frustration etc. Synonymous with "duh!" after somebody says something stupid.
Amy: "Fry, alcohol kills brain cells."

Fry: "No I'm doesn't!"

Amy: "Spleesh!"
spleesh! by overflow parking August 3, 2010

Sploesh Cult 

A group of friends who met on Discord and play alot of games together.

Ever since a raid on Quackity's DC Server, they started a Cult and are inviting people to it.
Which Cult is that?

Pogchamp, that's Sploesh cult!
Sploesh Cult by ankesphoria January 13, 2021
Shleesh means a slag. Someone who if you saw a party you'd stay away from because she's been around a lot. Often a very good looking girl but for your own good/safety, you'd stay right away.
Pete: Hey, that Laura's fit as fook!
Bob: Pete seriously, shes a full on shleesh, trust.
Pete: Oh, ok.
Shleesh by BburnLad. July 7, 2009
Gary - "Where did you get all these cool items from?"
Ben - "I got them from Sleesh"
Sleesh by MarketLover May 19, 2021

Spleesha 

The act of inhaling a sheesha and a spliff at the same time.

Spleeshing is commonly performed when stoned

Side affects include - partial blindness
Salutations companion, fancy trying a spleesha?

Hey man, want to go spleesh?

OMG he's spleeshing his fucking balls off.

Dude i was totally spleeshless last night

Fuck man, dan's having a spleeshure!