diffy screw 

differential equations - the midway point in mathematics for most modern engineers

Once you're done with calc useless, you can take diffy screw

diffy screw by mouffpiece May 12, 2016

Flu Screw 

When you really want to have sex with someone, but it's evident they have the flu; fever, chills, stuffy nose. While it should be a deterrent and you're putting your own immune system at risk, you do it anyway.

Joe was only here for one night, sick as a dog, but I had to go for the flu screw because last time we saw each other he made me cum 9 times.

Flu Screw by RRiveraLB January 2, 2017

Cork screw 

Where u fuck a midget with no legs and spin her in your dick

Alex cork screwed goegina the midget on his dick to reach nigba +100

Cork screw by Bigdibber August 15, 2018

Rusty Screw 

1. The act of intercourse while a woman is on her period.

2. Fuckin' while she's on her period.

This is an old Sailor's phrase. It comes from the rusty-red color of period blood. And the slang term "screw" commonly used to refer to intercourse. It should also be noted that human blood contains iron, and its red color is due to an oxidation (or rusting) reaction.

Me and my boo had a rusty screw on the kitchen floor. It got real rusty.

Rusty Screw by drankinzailor January 5, 2019

iranian screw 

When a man had dickcheese and penetrates a woman to get rid of it

Im about to inflict the iranian screw

iranian screw by BombVestOwner January 28, 2019

Booger screw 

A a self-made tool by taking a napkin and twisting the corner of it to shape it into a screw like auger which is then inserted into the nostril and screwed deep into the nasal passage in the hopes of extracting a large juicy booger or a huge dried Maple leaf.

I made a booger screw the other day and got this huge booger out of my head

Booger screw by Kingbuku January 24, 2020

Because screw you, that's why

Used to provide reasoning for seemingly random, unexplainable events that occur that result in unfortunate outcomes. Most often used for video game RNG.

Guy 1: Damn, why'd the teacher give decide to give us a pop quiz today? I didn't study!
Guy 2: Because screw you, that's why!

Because screw you, that's why by BomberJacknut August 31, 2020