Students for a Democratic Society. It was founded in the 1960s as a radical student organization. It was dissolved in 1969 but a new generation of activists have revived it as of 2006 as the "New SDS."
The SDS is making a comeback.
by NeverTooLate July 22, 2007
Short for Some Dumb Skank. A name/label given to a female who is undeserving to be called by their real name.
I'm so glad I finally broke up with SDS.
by Shaun Poteracki October 23, 2006
-Second Date Syndrome

1. Having already met a girl or guy the day before (often at night) and you two were just so into each other, the second time you meet and for some reason they don't look as attractive or seem as interesting as they did before.

2. When meeting a particular person you had a hell of a lot of chemisty with at a previous time and for some reason it just isn't there anymore the second time you meet.
Josh: Man, I'll tell ya I was really feelin' this girl last night when we met at the park, but for some reason she just ain't as fun and sexy as she was before...

Jerry: Ha ha. Sounds like ya had a case of SDS. Sucks for you...
by Domah Da Duce September 25, 2006
An acronym that stands for Same Day Studying. In reference to high school and college students who wait to study until his or her other classes on the day of the test.
"John what're you doing?"
"Oh just a little SDS."
by Tyler Maloney November 13, 2007
Sore Dick Syndrome. To have a sore dick.
I went out and got hammered last night and woke up naked on the floor with SDS.
by Fryhtanic April 09, 2004
The "clan" or group of friends formed originally in the Starcraft channel "aoe" but changed the name to SDS because it got too crowded, then created many Yahoo! Groups.

The shortening of "shutupdangit" to the initials of SD and the shortening of "Dargoon_Slayer" to the initials of DS. The two put together make the initials of SDDS, or SDS when shortened.
SDS Rulez!
Join SDS today
I am a member of SDS
by shutupdangit August 13, 2003
Shitty Dick Syndrome.

1. After cumming during anal sex, you pull out just to get a shitty surprise all over your dick.
Guy 1: Bro I was fucking this chick in the ass and when I pulled out it was just gruesome! There was shit everywhere!!
Guy 2: Awww this dude got SDS
Guy 1: What's SDS?
Guy 2: Shitty dick syndrome!!
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