semi 

A person who has a high tolerance, or can take numerous shots, blows, etc, but remains stoic or unfazed. The usual context is referring to a person in a fight or a person drinking numerous shots.

He's not even fazed. We got ourselves a full-blown semi.

semi by The Great Dark January 31, 2015

Semi 

Halfway between Hard and floppy, often what men with small penises get when they shower with other men to cover up the fact that its tiny

Bloke 1: Man that dudes got a big slong!
Bloke2:Nah its probably just a semi!

Semi by Moby January 27, 2004

semi 

Say "semeh" or "semi hot up" or "semi hot"
The primal meaning is when some situation is slightly conspicuous but not blatent. It comes from the word hot up which means conspicuous, originated in Tinsley, Sheffield. Pronoced in a northern british(yorkshire)accent.
Also the word is often used when a situation that should perhaps be subtle or secrative is really obvious, in which case it is used sarcastically, sometimes as "bare semi".

You've just picked up and ate a sweet from the pick and mix section in a store. You're friend says, "semi"

Two friends in a car at night jump a red light and then notice the car stopped oppisite is a police car. One of them says "semi", the other replies "bare semi".

semi by Harry Khan June 29, 2008

semi 

type of firearm

yo when we go to tha club tonight...be sure to pack a semi

semi by diizzii May 17, 2003

Semi 

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 !

Semi by Boyyest1534 July 19, 2019

Semi 

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.

Semi by iSemi December 23, 2008

Semi 

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.'

Semi by Lola Sparks May 18, 2019