isd 

Uk slang used in text - abbreviation for "I swear down"; like you 80% think that you know something but there's a small chance you're wrong

person 1: yo isd u from east

person 2: nah cuz I'm south
person 1: calm say no more g

isd by J2TrappyStyll April 7, 2022

Isd 

ISD, infant size dick

In life you're either a ISD,TSD, or lucky enough to have a MCR .

Isd by Pollydol December 25, 2024

ISD 

Is so dude

"I saw two people fighting over a cheese stick today."
"I don't think that's the truth."
"It isd."

ISD by SardinesandCheese July 2, 2025

isd

A term originating from the iseder community used to describe someone who’s insanely trim, stylish, swaggy, or effortlessly cool. Usually said when someone has a hard fit, or carries themselves with confidence. Being “isd” means you’re naturally clean without trying too hard.

“Bro got the new fit on, he’s actually so isd.”
“You’re so isd bra 😭🔥”

isd by psalmbite May 18, 2026

ISD It 

From S_w1ft's SCP:F, to quickly and briefly rectify a group's state such as a department.

"If the CMs are in a bad state, we can hopefully ISD it."
"We really need to ISD the CMs"

ISD It by dado_offbrand April 10, 2021

Klein isd

Klein isd is a school district in Houston TX that hates canceling school. There twitter is super live and they love roasting and blocking trolls. The teacher are kinda shitty but apparently it is the best district in the area. There are also tons of thots and f boys.

I can't believe Klein isd hasn't cancelled school, to roads are so flooded.

Klein isd by Leggingsarealliwear123 February 1, 2018

Cypress Fairbanks ISD 

A school district where faggots, niggers, beaners, ling lings, allahu akbar bombers, white crackas, and more niggas go.

Bob: I go to Cypress Fairbanks ISD
Jim: You fucking FAG

Cypress Fairbanks ISD by Gaynikker April 17, 2023