IST

The Immobile Stoplight Texter (IST) is a driver that misses the light turn green at a stop because they are busy with their phone or other portable device, causing whoever may be behind them to wait. Depending on the amount of lanes, two or more 'isters' may pull a multiple IST at the light if they are counting on the movement of each other in their peripherals to cue them to go.

A: Sorry I'm late, these two idiots pulled a double IST three times in a row and nobody near the front had the balls to honk them on.

B: That's nothing. Last week, these three stooges pulled a triple IST while I was hitting my car pipe just long enough for a cop to pull up and catch my shit. Thank Jebus that new texting while driving law passed-- pig was so pissed about the isters that all he needed was a reason to bust their asses, so I was home free!

by DuckLucker October 21, 2012

IST

Means Initial Strength Test, the entrance physical fitness test for the United States Marine Corps.

Heard you where trying to join the Marines, you pass the IST?
That IST is a killer!

by SummerBoi?! June 1, 2018

Ist

A Swedish acronym of “instead”

Person - “aye girl what’s your number?”
Girl- “just take my Snapchat ist”

by Seven sick sailors August 5, 2018

IST

The worst possible class you could choose as an elective in years 9 and 10, especial when the teacher has no idea what he is teaching (and even admits he has no idea), and the class ends up teaching the teacher. On top of this the curriculum is literally older then most high school students.

Dude IST is literally making me want to kill my self, the teacher knows nothing and the curriculum is older then I am!

by ToganPLayz August 27, 2018

Ist

Is in German

Deine Stirn ist größer als Uranus.

by Gay kidnapper August 2, 2023

IST

Brazilian abbreviation for "Infecção Sexualmente Transmissível", or "Sexually transmittable infection"
Yeah it basically means a STD but for Brazilian Portuguese

"Tome cuidado com as IST's!"
Translated: "Take care with the STD's!"

by Borzoilover January 1, 2024

IST

An acronym for Information, Science Technology. It is commonly used to refer to computer technology all together.

"I'm doing IST in high school rn"

by yogha February 29, 2024