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8.
sd
Sweet dreams, used in a messenger conversation
TC SD NN
by Sofiamore April 21, 2011
 
9.
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
 
10.
sd
Internet abbreviation for 'send' (usually used for emails and ocassionally PMs).
A: ill sd u dat super awesome game if you sd me that super awesome movie
B: u mean that afv submission dat never got sded?
by JQPublic January 23, 2012
 
11.
SD
Sugar Daddy. This is commonly used for males with $, advertising/postiong, looking for companionship.
Any ladies in South Burbs 18-25 yo $eeking a SD?
by Spider8008 October 29, 2011
 
12.
SD
A abbreviation for "suck dick", it can be altered to correctly fit the sentence gramatically.

The term was originally coined by Aren, who used it with the letter M in the middle, rendering it SMD, "suck my dick".
"Go SD you fag!"

Person 1: "Fuck you!"
Person 2: "S my D bitch."

"Have you ever S'ed D?"

Angry Student: "SMD"
Teacher: "What?"
by go S a D December 24, 2005
 
13.
SD
Super-deformed. In anime and manga, when a character is drawn cartoonishly short, about 3 heads high and has deexagerated limbs (i.e. having mitt-like hands, or long stubs for arms). Characters are often shown super-deformed when characters get in comical situations. Often used interexchangibly with chibi, though technically, they're twoi separate, yet similar things.
by Danny Sotelo May 04, 2003
 
14.
SD
Acronym for, Slydog
1: someone who gets with sluts when they are already in a relationship.

2: someone who does something on the sly.
Danny I cann't believe you slipped that lass one up the arse when your married. Such a SD you are.

Fucking SD mate, as if you managed to get me 50 condoms without anyone seeig you.
by Dan Bates January 30, 2008