Needle in a Haystack 

(figure of speech) referring to something small that is difficult to find in a large space, it quite literally would be like searching for a needle in a haystack, obviously nigh impossible.

Finding your dick to take a piss must be like finding a needle in a haystack.

Needle in a Haystack by Tsyklon Be September 3, 2017

Needle in a Haystack  

when a man has a small penis and has sex with a woman with a big bush.

You're so small I bet it's like a needle in a haystack when you fuck.

Needle in a Haystack by The Kofster March 10, 2009

needle in a haystack 

Male with small penis who has a large amount of pubic hair.

I couldn't have sex with Nico last night. His dick was like a needle in a haystack.

needle in a haystack by jellytime October 4, 2010

Needle in a Haystack 

Usually used when someone's trying to do the impossible.

It's also used when you're coding

Needle in a haystack coding example:
strpos("haystack", "needle");

Needle in a Haystack by ihfsdihaoifd September 21, 2021

Needle in a haystack (literally) 

When a needle is impossible to find because it’s in a stack of hay

“there’s a needle in a haystack (literally)

Needle in a haystack (literally) by ImMaker37 June 28, 2023

finding a needle in a haystack 

When you need to do something that is really hard, almost impossible

They were on the bleachers.
Looking for then was like finding a needle in a haystack.

finding a needle in a haystack by Conrado41 March 14, 2017

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