It's when you are the only dude in a room full of hot chicks.
You are more likely to get laid, when you have the only swinging dick around.
Dude, did you hear? Evan got laid by three different chicks last night at the same time. How the fuck does that happen? He was the only dude left after the party. Like a dick in a haystack...of vaginas.
When you pee in a girls butthole then them shitting on your dick while it’s still inside them.
Me and my girl just did an Oklahoma Haystack
When you shave your pubic hair, cum on it so it glues together, and then shove it up your ass.
She loved my haystack last night
When two hillbilly's mash their nuts together after harvesting second crop hay.
When my cousin Terry and I got off the tractor. We went and had ourself a haystack goat masher.
A difficult situation in which a palestinian chick is about to get seduced by two french speakers.
"Reem is like a donkey between two haystacks"
When a needle is impossible to find because it’s in a stack of hay
“there’s a needle in a haystack (literally)
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");