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19.
SD
Secure Digital, probably the best solid-state memory cards money can buy, Faster and safer than XD, CF, Super CF, and MMC
I bought a 64 MB SD card for my Digi-Cam.........Dude excellent choice!
by Nik Canning August 17, 2003
 
1.
SD
San Diego
Welcome to da SD, niccuh/
by Gamechibi August 24, 2003
 
2.
SD
1) San Diego (City)
2) Sour Diesel (Marijuana)
I just took a trip to SD(1) and me and my homies there blazed some legit SD(2) there. It was dope.
by Turtle Face August 21, 2008
 
3.
SD
Meaning "so drunk", SD is used when one is incapable of forming actual words due to their severe level of intoxication. It is also perfect for college dorm white boards, when you want your friends to know how drunk you are but would prefer if your RA did not.
"Hey, are you okay?"
"(slurred) SD!"

"I was so SD Friday night after the Mexican restaurant that I sullied my pants"
by Cat Baker May 04, 2009
 
4.
SD
Sugar Daddy
i have to call my SD b/c i overspent my budget this month
by simplyflygirl May 18, 2009
 
5.
SD
SD, referring to the phrase small dick. Obviously someone nicknamed SD has a small dick. It can be used literally, or as an insult.
Guy 1: What's up SD?
Guy 2: I hate it when you call me that.
Guy 1: But it's true, can't deny the truth!

Guy 1: That Jason is such a SD.
Guy 2: For reals!
by rice4lyfeinda415 May 07, 2009
 
6.
SD
SD / Sugar Daddy. A person who will buy gifts, pay bills, and spoil someone in exchange for something, usually sex.
I'm broke I don't have any groceries and my power bill is due. I need to fine me a sugar daddy. On craigslist people will say they are looking for SD.
by LanceManly56 December 14, 2012
 
7.
S'd
Short form for stoned. Potheads have created this word as they found using short forms made it easier to comunicate with one another.
"look at you man, your fucking s'd!"
"im soooo s'd right now"
"lets get some taco bell for after we get super s'd"
"black guys eyes always look like they are s'd."
by Kzeuss January 24, 2006