Growing mushrooms 

Used mostly in anime and manga, the term growing mushrooms refers to when a character has become immensely depressed or saddened. The character is often shown to literally grow mushrooms on their body, signifying that their soul is, for the time being, in a dark and dank place. (Mostly occurs with more dramatic and over the top characters who can't stop crying every 2 seconds 😒)

Senpai: (crying because the girl of his dreams thinks he's dramatic and egocentric)
Girl: "Senpai, quit growing mushrooms around me; the smell is absolutely noxious!"

Growing mushrooms by zoy70 June 3, 2018

growing mushrooms 

Sitting for a long while

My little brother hasn't been doing his chores, he's just hanging around the house , growing mushrooms.

growing mushrooms by Little dapper August 10, 2017

Growing a Mushroom 

getting an erection, usually used when a surprise boner begins to form

As Jim's pants started to get tight he stated, "damn i'm growing a mushroom".

Growing a Mushroom by benny_64 March 17, 2009

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