STS

Supplemental Training Systems.

A top bodybuilding supplement line.

Josh Duhamel has been caught by People magazine jogging while wearing an STS shirt.

by Candycasa December 3, 2009

ST

swedish tuck - the act of hiding an erection behind the elastic in your pants

He began to ST when he had a morning bulge

by tory borty May 11, 2013

STS

STS means Smirk to Self, it's for when a Lol is too much and a ROFL is way out of the question.

Helpful for when someone tells a joke thats not really funny but you didn't really laugh at it a STS helps you escape scot free.

Bob: Dude, my mom has AIDS
Me: STS
Me: Im sorry dude....pwnd :)

by Shane Branning May 20, 2007

ST

A common abbreviation for the ever popular arcade fighting-game Super Street Fighter 2 Turbo made by Capcom in 1994, and using the Capcom Play System 2(CPS2) -arcade board. Mostly used by professional / tourney -players.

Hey, Tom, how about we play a few casuals of ST?

by FillingInTheBlanks April 14, 2008

STS

Sucky Typing Syndrome

"Wohw iam sow koolw."
"Dude, you have STS!"

by mwaldenp May 27, 2009

STS

Stop Talking Shit.

X: "I heard iPhone 5 is trash.."
Y: "STS.."

by xRussian September 21, 2012

ST

Screw that

ST that home-work.

by Meaningless April 26, 2015