An erect penis. Term first used in the book The Forever Question: Goonocracy.
"He used his diagonal protrusion to activate an uncomfortable conversation by poking her ear."
by Prolapsing Profusely August 16, 2011
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diagonaled is a verb for two numbers that are placed diagonally to each other in a proportion equation.
The easiest way to solve for the unknown in a proportion is to multiply the two numbers diagonaled to each other and then divide by the number diagonaled to the unknown 'X'.
by Grok Mathing December 31, 2016
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A girl with many secrets and hidden talents. Nefarious and invisible to her peers. Most likely goth.
She is waiting to be discovered but, the variety of personalities, problems, and past experiences she carries with her are preventing that. For now, all she can do is hide behind her notebook.

If, and only if she opens up, the world will truly know pain and suffering.
Some girl1: who is that?
Some girl2: I think her name is Diagon... she’s a bit creepy.
SG1: she LOOKS a bit creepy. I’m gonna keep my distance.
Diagon:*looks up*

SG2: we should go... NOW!
Diagon: *mumbles* you just wait
by WPD#9999999 December 18, 2018
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Diagonal nosing is the act of inserting your nose into a woman's belly button, whether sexual or non-sexual is irrelevant.
"Hey, bro, did you hear what Max did to Cait?"

"No, man, what happened?"

"He diagonal nosed her, dude."

"Oh, dang, bro, I didn't know she was into diagonal nosing."
by Dapper Damp June 11, 2022
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diagonal nosing is the act of inserting your nose into a woman's belly button, whether sexual or non-sexual is irrelevant.

Can be a serious moment or just a laughable act.
"Hey, bro, did you hear what Max did to Cait?"

"No, man, what did he do?"

"He shoved his nose into her bellybutton! He diagonal nosed her, bro!"

"Ah, dang, dude, I didn't know she was into diagonal nosing."
by Dapper Damp June 11, 2022
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