S.H.I.T. 

Acronym, much like tgif, meaning "Sure Happy It's Thursday

Guy 1: S.H.I.T.!
Guy 2: TGIAF!

S.H.I.T. by jzawadzki04 October 7, 2010

S.A.F.K 

Socially Awkward Fat Kid

that fuctard over there is such a S.A.F.K

S.A.F.K by the sarcastic zebra December 31, 2010

S and an S 

'S'hit and a 'S'hower, in that order! it's what you say to your friends when they ask how far away you are from the meeting place.

"how far away are you broseph?" "Imma take a quick S and an S and be on the way" "ideal"

S and an S by mrsocure January 6, 2012

S.I.D.

Satiat-ed(y) Induced Dyspnea
A case of breathlessness in any position after a heavy meal that is non-life threatening.
Basically difficulty breathing with a full stomach.
Treatment: A bed/couch/divan, AC, sleep.

(Post Heavy Meal)
Burrrrp...man I think I have S.I.D.

Eda, SID adichu da.

S.I.D. by Quack M.D. August 9, 2017

S.N.S 

Acronym for “sister needs sister”

Like S.O.S but specifically for sisters.

Text..
Me: “S.N.S”
Sister: “on my way”

S.N.S by Barbie.princess February 22, 2018

S.Y.D 

Similar to L.A.D(Lick A Dick). It's an acronym for See Ya Dickface

A: Aight later faggot
B: S.Y.D

S.Y.D by ProfessorFilthyLazis August 4, 2018

S’mores

A sex position with a white person and black person in the middle. They must be positioned between two crackers.

The black and white person having sex we’re between two white crackers doing the S’mores.

S’mores by Frobro85 July 13, 2019