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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
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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
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Small dick syndrome, when guys are shy to get there penis out to girls, because its small and there insecure about it.
ollie :Harry Dewson has s.d.s
bella : yes i know his dick is tiny i gave him head
ollie : haha everyone says that
by bada4321 October 20, 2011
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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
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