Going Off The Deep End 

To degenerate cognitively, to be in the process of having a mental breakdown, the process of going crazy

Jeff: I can't believe what my pops says sometimes. It's like he's incapable of higher thought!

Julian: Yeah, I'd say your pops is going off the deep end LOL!

Going Off The Deep End by paynasty23 September 12, 2010

rolling down in the deep end 

a lyric from "astronaut in the ocean", a 2019 song by that was released by masked wolf and gained popularity from tiktok when the song was re-released in 2021

"what you know about rolling down in the deep end"

rolling down in the deep end by ninjakirbz June 22, 2021

sex in the deep end 

1. An act that can be accomplished only by a swimmer and a girl. It consists of pull buoys, kick boards, the deep end of the pool, and some very strategic movement. A swimmer that accomplishes this would be known as a god among his team mates.

2. Slang term for pulling off something crazy.

1. Jake took Mandy to the pool yesterday after school and they had sex in the deep end!

2. You did what? That's total sex in the deep end, man.

sex in the deep end by That one cool person January 2, 2005

left me in the deep end 

meaning another person left you in depression, in a bad place that you didn't wanna be in.

he switched up and left me in the deep end

left me in the deep end by behebehehsksjabw December 10, 2016

The Deep End (Karandeep)

A person who plays RS all day and has no friends.

"OMG the Deep End (Karandeep)just passed by!"

The Deep End (Karandeep) by Schlackster January 11, 2009

Off the deep end 

The opposite of a prude. Someone who is bold with sexual activities.

Shanaynay: “I’ll grab your dick whenever I want”
Ken: “woah. You are way off the deep end. I’ll give you my life boat.”

Off the deep end by Purdalicious January 26, 2020

in the deep end

i. Someone who is immersed in a particular belief system in the sense that they are "over their head" in the deep end
ii. Anyone who is really into anything well beyond a casual engagement

Shelly practically lives at her new church, I think she is in the deep end.

in the deep end by sommnis May 11, 2014