A psychological term. When a participant is in an experiment you may not get accurate results because they are aware of the experiment and in turn go out of their way to do everything wrong or go against everything u ask them to.
scientist 1 "this guy is doing everything wrong"
scientist 2 "ah a classic case of the screw you effect"
by HellsMajesty November 10, 2007
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Meaning screw you and your household but you are implying thaat they are poor and they live in a cardboard box thus making it more insulting.
Screw you and your box then!
by Francisco The Robot July 25, 2010
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A Marker failing a students coursework when the find the screw you effect quoted unnecessary or other smart ass terms.
Student X Coursework: "the results of the experiment may not be valid because of the the screw you effect"
Marker 1: What a douchebag FAIL
Marker 2: Student X clearly has not heard of the marker screw you effect
by angrypsycho May 13, 2010
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a simple phrase that declares the superiority of people from Texas
New Yorker: I don't like BBQ and I don't understand Sweet Tea

Texan: Screw You we're from Texas
by deuce13 October 26, 2011
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A threat to be taken very seriously.
Results of ignoring this threat are the thing that is posted in gore threads on 4chan
What will you do about it

I'll screw you sideways with a rake

You wouldn't dare

oh yeah (gets out rake)

what the! argh, what are you doing to me?!, AAAARRRRGGGGHHH
by Alex07169 August 16, 2010
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a phrase with origins in the late 20th century used to tell someone that they are being assanine, incosiderate, rude, or prickish.
You: Hey amigo would you keep that damn music down? I work third you know.

Latino Neighbor: Ese its Cinco De Mayo, the celebration for the freedom of my country!

You: Why dont you celebrate later buddy oh yeah and Screw you and the horse you rode in on!
by IAM GREENCURSE March 24, 2010
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