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3.
To make a mess of something, to completely ruin something, to make a mistake
Ffs, what a Screw-Up.
"did you see that? what a Screw-Up!"
by FelixB666XD November 08, 2009
17 1
 
1.
someone who messes up consistently
Your failing, Jimmy?! I swear it, you're gettin to be a screw up.
by Nicole February 16, 2004
307 57
 
2.
1. To fail at something, to do something wrong/incorrectly (sometimes repeatedly). Someone that screws up a lot is called a "screw-up"

2. To describe hurting someone emotionally or physically. Commonly used when threatening the one you want to hurt.
1.
Person 1: "I stayed up late last night to study but I couldn't concentrate that well."
Person 2: "You're gonna screw up that test."

"This is the 5th time in a row I'm getting a bad grade. I'm really screwing up."

"I couldn't stop stuttering when introducing myself to him. I screwed up so badly."

2.
"Oh yeah!? You wanna mess with me, kid!? Ohh, I'm gonna SCREW YOU UP!"

Person 1: "Haha, I totally screwed that kid up, did you see his black eye?"
Person 2: "Yeah, he deserved it!"
by HaltDenMund December 20, 2010
87 59
 
4.
Screw up is when you say the wrong name to your bitch while having sex.
uhhh Britney spears, you're so hot - SLAP - My name is Celine dion you stupid motherfucker!
by Kasper Nielsen April 03, 2004
151 306