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

by J2TrappyStyll April 7, 2022

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ISD

ISD is a unit in SCP(secure contain protect) that secures loyalty in all members of the foundation. track down traitors and secure the foundation. huh I think SCP is gonna get a lot more popular.

"The facility is going on lockdown deploy all ISD units(05 talking over facility radio)"

by hjgvfhufejjfjfjjejdjdjjfhhfhhh January 26, 2021

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Apple Springs is an independent school district located in East Texas. Well known for how bad their athletes, staff, administration, teachers, students, and cafeteria food. All are well below par and all seem to struggle in their respective areas.

I went to Apple Springs ISD for a week and this place sucks ass.

by Lightning_stick01 March 31, 2022

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