The act of leaning forward whilst taking a shit that comes out in ball-shaped projectiles which tend to splash toilet water forcefully upward at one's scrotum and into one's anus; leaning forward to avoid such a splash.
friend: "Why the hell is there toilet water all over the floor?"
man: "Oh... had to do a toilet lean. My taint was getting soaked."
man: "Oh... had to do a toilet lean. My taint was getting soaked."
by 1freeradical November 18, 2011

Bobby took the stripper to the seedy motel on the corner of 11th and Skidrow, it was dirty so he made her give him a Tennessee lean-to
by Urbandicdude November 6, 2020

The attempting of logical reasoning whilst under the influence of high grade sensi. The subject may be under the illusion s/he can attempt to work out a highly ambitious problem but will often end up forgetting the original problem before working out the solution. In other common cases of Lean Mathematics, highly simple calculations like working out percentages or adding round numbers are often wrongly executed.
i. Shabazz was in licked out of his head in the back of Icky’s M3 and was attempting lean mathematics by trying to figure out how much profit he could make if he bought two 9bars and sold 1.3grams for £10 each. Reason was he wanted his own M3 and it would take him too long with the wage he got working in his fathers newsagents. After 20minutes trying to work it out with the sound of 2pac pumping in the background, he totally forgot what he was thinking about and instead though about what colour he wanted his car in (matt black or ice white).
ii. Mams went into kababworld at 4am and spent 10minutes using lean mathematics to try and work out if he had enough to buy the 3 kababs and 2 nourishments he wanted and got it completely wrong when he got to the till. He didn’t care though as he still had some green left to bun after he’d consumed his munchies
ii. Mams went into kababworld at 4am and spent 10minutes using lean mathematics to try and work out if he had enough to buy the 3 kababs and 2 nourishments he wanted and got it completely wrong when he got to the till. He didn’t care though as he still had some green left to bun after he’d consumed his munchies
by A MASON November 3, 2010

The original 'gangster lean' came from old gangster movies and may have even been taken from real life. When fleeing (usually from the scene of a crime) and a car pulls up and you jump on the side of one of those old gangster cars like a 1937 Hudson Terraplane, and you lean on the outside of the car until you're far away.
From Roman Polanski's 1974 timeless crime/mystery classic 'Chinatown'. Jack Nicholson and Faye Dunaway are told to get into a car by some thug, and Nicholson goes to beat him up while Faye takes the car and starts it towards Nicholson as he jump onto the car and does the 'gangster lean'.
by BushwackerJones July 19, 2007

For the friend who doesn't know how to make dirty sprite, so they decide to make it using sprite and children's benadryl.
Person 1: Yo,got some lean. Want some? It aint fuck me up yet
Person 2: How you make it?
Person 1: Sprite and benadryl
Person 2: Yo dumb a**f forgot the codiene. BOI YOU TRYNA TURN UP OR STOP A COUGH TF? getcho boof ah lean outa here boi. Clean Lean havin a** boi.
Person 2: How you make it?
Person 1: Sprite and benadryl
Person 2: Yo dumb a**f forgot the codiene. BOI YOU TRYNA TURN UP OR STOP A COUGH TF? getcho boof ah lean outa here boi. Clean Lean havin a** boi.
by xX_Cancer_Xx August 12, 2017

by Not your average nigga July 3, 2021

When you take a piss into a toilet at home and you don't want your bitch gettin' up your ass about pissin' on the floor you do a 'gangsta lean' toward the toilet so all the drops go into the bowl.
Yo man, when I was taking a piss at home I had to do a gangsta lean so I didn't piss all over the floor and get my bitch pissed!!!! Don't want piss on the floor and a pissy bitch!
by Whackamole February 10, 2007
