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