sdi 

An acronym for "Small Dick Island". Is used to indicate a group of tables in a office.

Julian sits at the sdi.

sdi by reteip September 18, 2023

SDI 

Acronym for "sucks, doesn't it?"

Monday-
You: What'd you get on your test?
Me: I failed :(
You: Hahaha. Good job, fuckhead.

Friday-
You: Dude, I totally just failed my test in bio :(
Me: SDI. XD

SDI by Margo Roth Spiegelman II April 14, 2009

sdi 

"Stratigic Defense Instatute". It could be some kind of super secret military organisation so secret that nobody knows the slightest damned thing about it. Or the previous description simply matches the wet dream of some guy, when in reality it's just the "company" name of some guy who made an unlicenced Star Trek board game.

Synonym: 'pathetic'.

"I am not the computer wiz! Dr.'s Bob and Geodude have that responcability. I've told you all before, It's not my yob, man!"

sdi by Lord of the Farce April 7, 2004

SDI 

imaginary instatute made up by a 1337 master of "tai qwan doe" who is richer than god and lives in his parents' basement.

either that or a really sad 50 year old

the explosion is really a ring, not a circle!

SDI by General Zod April 7, 2004

SDI 

Some Dude on the Internet

SDI said it so it must be true.

SDI by whereismyfood November 28, 2018

Sunset District Inc/Irish (SDI) 

Sunset District Inc/Irish. In the 70/80's a rough group of white boys. 90's and beyond...more myth than reality, but still around.

The Grove. Sunset District Inc/Irish (SDI)

Sunset District Inc/Irish (SDI) by goast April 15, 2013

sdihs 

#sdihs suck dick in high school
frequently used for 8th grade thots going to high school

*yearbook signing*

i’ll miss you so much next year. hope hs is great #sdihs

don’t forget to sdihs

sdihs by ibanezz June 20, 2019