in his head 

When you are playing a sport or anything competitive, and you are playing against somebody. And you or they start trash talking, giving looks, or playing tryhard and making them or you mad. And they let their anger get to them while playing in the game so they can’t focus.

Dude 1: Bro i’m in his head

Dude 2: yea man he is hella mad he is about to be so trash

in his head by wts.justin March 12, 2020

lead in his head

Presumed lead poisoning, causing acts of extreme blankness.

"Maybe the lead in his head will gently bend the branch down to the ground before he finds out what it takes to make it to heaven."

lead in his head by enviroman September 22, 2011

jerb 

well known from south park
rednecks get angrry that future folk took there jobs so they yell
They took ouare jerbs!

Them future folk took ouare jerbs!

jerb by Jimberley Kim April 7, 2005

Cheeks 

An Irish phrase meaning shit, derived from ass
(Not to be confused with the literal description of one's buttocks)

"Did you hear the song Aylek$ dropped?"
"Hardly. Her music is absolute cheeks."

"My boyfriend say LaFlame is cheeks."
"Tell your boyfriend I said it's his mixtape that's cheeks."

Cheeks by thecartisan April 26, 2020

sans sheriff 

Lawless use of fonts or typography, with no regard to aesthetics or legibility

I'm putting this CV straight in the bin. Written totally sans sheriff.

sans sheriff by Jamarley July 3, 2019

Breadhead 

Someone who is addicted to obtaining money and building wealth. A money addict and fanatic. Breadheads often work more than one full-time job, and some even participate in illicit activities to "obtain the bread".

A breadhead is like a crackhead, but for money instead of crack.

Breadhead by 🅱️ U S 3 4 8 March 30, 2022

Stink lines

As seen in illustrations or cartoons: Wavy, vertical lines rising above a person, place or thing. Denotes a foul odor.

"You didn't put enough stink lines on your picture of the teacher."

Stink lines by Athene Airheart March 14, 2004