Top definition
Not quite an erection, but getting there.
When I saw Milla Jovovich's boobies I got a semi.
by Germ March 15, 2003
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May 13 Word of the Day
lil mad is like big mad but the opposite, you mad but not mad to the extent of pullin somthin
"look im sorry i ate your food"
"is cool im just lil mad"
by lilbabiey November 30, 2018
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2
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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3
the state of a penis which is not altogether flaccid nor erect. It will often occur at inopportune embarrasing times and will be brought on purposefully by a cunning sexy woman pretending she has no idea what she is doing.
"why are you still friends with some of your ex-boyfriends?"

"I like to keep them healthy and providing the regular semi keeps the circulatory system in check."
by MintyLeila June 18, 2005
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4
the in-between state of a limp dick and a usable hard-on. can be on the way to hard, on the way back from hard, or never allowed to get more than 60% (+/-) hard.
many a young man learn to hide their semi with text books after day-dreaming in class
by the mac al February 28, 2006
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5
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.
by The Great Dark January 31, 2015
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6
1 -(n.) Any semi-automatic weapon; semi-shots, smg's, etc. (pronounced "seh-MEE")

2 -(n.) An 18-wheeler truck (pronounced "seh-MI")

1 - "Semi's are only half as fun as automatics."

2 - "Aparrently a semi loaded with cocaine and doritos rolled over on the freeway yesterday.
by Lil Dre March 19, 2006
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