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 (literally)

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

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

Haystacking

The act of strategically restricting your Tinder settings in hopes of finding one person of interest. This is especially helpful if you want to make your intention to hook up clear without a discussion. Incredibly useful in a small-town where you want to know who's DTF.

Did you try haystacking that girl you met at the bar on Tinder? With the right location and age settings, it definitely won't take you more than two days to swipe through and find her if she's on there!