Screw yourself 

It means you're being/doing/saying something unpleasant and you need to go away and get lost.

A person who is upset at someone else's actions tells them to "Screw yourself". They could also say Fuck yourself instead but Screw is the cleaner version.
Q: How does "Screw yourself" or it's equivalent "Fuck yourself/Piss off" mean 'get lost'?

A: 'Screw yourself' implies before this bad transaction between 2 parties. The analogy in this sexual metaphor is that it WAS a mutual and pleasant affair between the 2 parties BUT now the offending party can do it all alone (Masturbate) because they're no longer welcome in each others company.
Ergo, screw yourself cuz I ain't fuckin' witchu no more

Husband comes home from work to hear wife yelling and complaining again at him as soon as he walked through the door but their children are present, so he responds: "You know what I'm tired of you telling me what's wrong every single time I come home from work. Go screw yourself, I'm out!"

Screw yourself by Priz13PersianSouls March 13, 2017

Screw yourself 

To go fuck yourself. Insert your penis into your asshole, or your finger into your titty blob.

Go screw yourself, Dave, and get the fuck out of my house!

Screw yourself by AnonymousDefinition January 5, 2015

go screw yourself 

To insult a rude person

“Oh, go screw yourself Jimmy!”

go screw yourself by Spikethemad712 May 14, 2018