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To exchange live audio/video feed or pictures via the internet with another person. Sometimes while partially naked.
Me and Tommy semi'd online the other day.

I was semi'ing again with Rachel on Friday.

I semi'd you the pics the other day, man.
by iSemi December 22, 2008
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15
Semi is the most amazing girl you will ever meet. She is the smart, athletic and popular all-in-one, not to mention how hilarious she is! If you ever meet a Semi, you better hold on to her because Semi is also a very generous person. She's not the most beautiful girl in class, but all the guys want her. Semis are usually tall, with black hair.
'Man, I really need a partner for this science project! '
'Why don't you ask Semi? I'm surprised she hasn't been asked yet considering she is the smartest girl in our year.'
by Lola Sparks May 18, 2019
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The act of fisting your partner with 18 fingers, being 18 fingers for 18 wheels, generally putting 6 in the front, and 12 in the back, often requiring more than 1 person giving the Semi.
I hooked up with Sammy the other day, and she really wanted to bang, but 2 of my other friends wouldn't stop tagging along where we went, so she took my offer for a good ol' Semi, I hadn't seen her again until the obituaries in the newspaper, she died from being too loose, releasing her organs out of her body.
by xXKokOfJusticeXx June 14, 2013
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Semi is a sweet, strong and energetic person. Who is kind and nice to everyone. He has a special way to make your day brighter. A strong, powerful man. So funny and nice. A fun person to be around. He also known of being weird.
Semi is sooo weird lol !
by Boyyest1534 July 19, 2019
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Not quite a full on panic attack, but getting there.
I smoked hella herb and I'm having a semi.
by Maria Pereira October 06, 2020
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20
someone who thinks that they are a fboy but in reality are just ugly and cant get a girlfriend
girl: he is such a semi
boy: yeah exactly
by semihater_123987 March 28, 2021
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