semi true story

When your story is just not quite a True Story, but not quite a lie.

Dena told Shawn a semi true story the other night. It wasn't completely true, but not completely false either. True story

by DenaLee June 22, 2016

Semi proprietary

When a device uses standard or non proprietary connections, yet makes itself proprietary by only working with certain devices. A good example of this is Astro Mixamps and Astro A50 Base Stations. Sure they'll work on PS4, Xbox One, and PC, but the specific Mixamp or Base Station for each platform is needed.

Astro Headsets are semi proprietary

by Jayrod64* November 30, 2019

Semi-trailer Seizure

When a semi driver slams on the breaks to stop and the trailer shakes and bounces up and down. Usually due to inattentive truck drivers.

person 1- OMG! I thought that semi was gonna ass-end us.
person 2- Yeah it was having on hell of a Semi-trailer Seizure.

by esunc91 December 9, 2009

Semi automatic

A full auto in disguise

Brrrrrrraaak

Guy 1-was that full auto
Guy 2-no that was 105 decibels and definitely a semi automatic bumpfiring. that's a .177 probably target practice.

by Cody5050 November 8, 2020

Semi-Selfie Mode

When one uses outer camera on a smartphone while a mirror that’s giving a reflection is on camera, making it the same as selfie mode.

He looked nice in the picture he took of himself in semi-selfie mode that he put on his Instagram story mode.

by Dray’s Dictionary May 15, 2023

Semi-day

When your day has it's ups and downs. It semi-sucked, but it also semi-rocked.

"My long time girlfriend split with me today... But her best friend went down on me. It was a semi-day."

by metalgearnoms June 29, 2012

semi-penultimate

Third to last.

The cars are just going into the semi-penultimate lap.

by Thorongil June 18, 2013