scarf: to eat.
"I can easily scarf an entire banana split."
screw up: to make a mistake.
"I screwed up on the driving test, so I didn't pass."
screw-up: a person who makes a mistake.
"Why are you such a screw-up?"
scum: a despicable individual.
"Don't hang around with that kind of scum."
shades: sunglasses.
"Those are really cool shades!"
shoot some hoops: play basketball.
"Let's shoot some hoops!"
silks: clothing.
"Those are really awesome silks!"
smarts: intelligence.
"It takes a lot of smarts to become a doctor."
smurfbrain: a dumb or stupid person.
"Stop acting like a smurfbrain!"
snookered: cheated.
"I got snookered into buying swamp land in Florida."
sofa spud: a person who watches too much television.
"I'm usually a sofa spud on Sunday."
solid (1): really good; cool.
"That new movie theater is totally solid!"
solid (2): consecutive.
"It's been raining for seven solid days."
specs: eyeglasses.
"I didn't know that you wore specs."
split: to leave.
"Let's split from here now."
spunk: spirit.
"She might be small, but she's got a lot of spunk."
stoned (out): drunk from drugs or alcohol.
"I'm really stoned (out), dude!"
street smart: knowledgeable about city life.
"Since Dave is from Los Angeles, he's very street smart."
suck: to be bad and unacceptable.
"That song really sucks!
Source: http://www.eslcafe.com/slang/s.html