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Dallan's law

Dallan's law is an epigram that is typically stated as: "If angle looks like 90 degrees, then it is 90 degrees."

The law is often followed by mistake in math where someone assumes that an angle in a triangle is 90 degrees so they can use rules that only can be applied to right triangles.

"90 degrees" can sometimes be a metaphor for something else e.g., "If someone sees a car as red, then it is red". This means that a thing can be perceived as something else even though it is obvious that it only can be one thing. A washing machine can therefore be perceived as a rocket launcher if that person is stupid enough.
Example 1:

David: Why do I get the wrong answer when I use the Pythagorean theorem?

Teacher: Beacause it does not contain a right triangle. You probably utilized Dallan's law.

Example 2:

David: What a nice avocado you got there!

Åsa: Thanks David, but that's a potato. I guess you're right though according to Dallan's law.
by Duckiiiii May 12, 2016
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Dallas Winston is a character from The Outisders. He's a hot greaser who doesn't show emotion but is mysterious and cute.
Dallas Winston's death was so irrelevant in The Outsiders!!!!
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dallased

A term which larries created which means getting railed, and then being seen with messy hair, glossy eyes, swollen and red lips + flushed cheeks.
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by moresau October 29, 2020
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When a girl gives a guy a blowjob with a lip full of dip (chewing tobacco)
“Man my girl gave me a dirty Dallas and now my d**k burns”
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Fuck load of dip and a mouth full of tip
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When somebody gives you a blowjob with a mouth full of dip, making your dick look like a turd.
Eric gave me a sloppy dallas last night, so now my dick has cancer.
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