Leaning left 

The way a beta male’s genitals lean. Should most definitely not be confused with Leaning right

Have you’ve heard about rick’s friend chad? Supposedly Chad’s dick is leaning left which means chad is rick’s bitch

Leaning left by CanuckTime June 26, 2018

Alpha left

The "alpha left in X" refers to the amount of opportunity lies in optimizing across a particular dimension "X". This is a homage to the learning rate in stochastic gradient descent (referred as "Alpha"). If there's a lot of alpha left in a dimension, you more quickly approach the local minima (minimizing loss with larger leaps). Therein lies opportunity through the asymmetry of effort to gain (eg. getting twitter clout or scamming VCs out of money). Once the local minima is reached, large alphas will increase loss, at which point the asymmetry of effort to gain is lost.

For more; see some adaptive gradient descent algorithms e.g. AdaGrad.

There's no alpha left in using "alpha left" as part of your vernacular, especially after it landed on urban dictionary.

Alpha left by kache_ May 8, 2022

Old`bus left 

An old woman bus driver who leaves kids that are running for the bus stop.

Richie;dude eveelen pace got Old`bus left by ms.licon to day

Old`bus left by want2befree13 December 28, 2005

Mila’s left boob day

On July 16th, 2021, Mila will show her left boob

Ya’ll know what’s happening on July 16, 2021 right? It’s going to be Mila’s left boob day!

Mila’s left boob day by guavivia December 28, 2020

A crow left of the murder 

Thinking on one's own. The use of "left" is also signifigant as a political statement, Incubus is very liberal or "left of center" whereas the Bush administration is conservative or "right of center". Incubus is saying new and original things that haven't typically been heard under Bush.

That punk kid at St. Joe's sure is a crow left of the murder.

A crow left of the murder by Incubus FTW April 15, 2006

Eleven Lives Left 

A term used to indicate one's good fortune in having 'beating someone else to it'.

"Ahhh I'm glad I got here first... I've got Eleven Lives Left."

Eleven Lives Left by Lukey April 4, 2005

judy in the left

an expression used in public or mixed company to indicate that you have a booger hanging out your left nostril - see also henry in the right

Sheila: "Oh Tara, you have a judy in the left..."

Tara: "Thanks for letting me know. I'll take care of her."

judy in the left by Bubbe September 21, 2005