Not quite a full on panic attack, but getting there.
I smoked hella herb and I'm having a semi.
by Maria Pereira October 6, 2020
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Typically a Ben, someone that is closely related to the following fictional characters: Remy and Sid
They’re just such a semy
by Ihavenofriendswaitwhat September 7, 2020
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Halfway between a hard on and a totally flaccid penis. Interestingly, the semi-on is becoming rarer and rarer in today's society, eclipsed as it is by the boner and the laredo. The semi-on's natural habitat is middle school and high school locker rooms, where it is created by young boys in an effort to demonstrate their virility. Intriguingly it is often understood as a sign of faggotry, resulting in a beat down for the perpetrator rather than the expected admiration.

Other times the semi-on can occur include:

* When the individual is too drunk to support a full erection,
* When the individual is somewhat aroused but controlling the feelings and suppressing the erection,
* When the individual is interrupted during sexual activity (or thoughts) but was turned on enough that the erection did not immediately disappear.

Occasionally the word is used as a pejorative to describe individuals who are somewhere between being flaccid cocks and total dicks.
Jimmy masturbated a bit before showering with the other boys: he wanted to look his best in front of everyone. He proudly entered the shower flaunting his semi-on. Later that night, surgeons were unfortunately unable to completely reattach Jimmy's left testicle, as its trip through the sewage system had left it in a rather poor condition.

Davan's grandmother surprised him nude: he tried to hide his excitement, but ended up with a semi-on.

After thirteen beers, John was only able to manage a rather pitiful semi-on, even as the dancer gyrated her hips in his lap.

That moderator is such a Semi On: he never takes a stance on anything, but still comes off as a total dick.

Though Derek was shocked by the interruption of the entrance of Laura's, his semi-on quite handily demonstrated his continued interest in sexual activity.
by SMRTA! August 23, 2003
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A bitch, a barcode boi who spends all his money on Fortnite and doesn’t have a house and is poor he has a girlfriend named fian
You’re such a barcode boi. I looked at home and got a semi.
by Drugdealer12345678910 August 15, 2019
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A guy w a big dick and a big heart ❤️
Semi the guy w the big dick and the big ass heart
by Ybnnasty January 19, 2020
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The word that comes up on t9 phones when the word "penis" is intended to be typed.
I got a text from Benjy that says, "I put my semis in her butt."
by Danielwritesstuff January 14, 2009
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A small boner over something none sexually related. It will be about 50% smaller
100% on a maths test forced him to get a semi
by Ben Ski Don May 3, 2010
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