S
SABISU sounds like SAH BIS: Loan word meaning "service" but when you hear it used in anime, usually at the end credits or previews, it refers to "fan service" which means that the current video or the next video in the series will include bonus scenes or artwork.
SADO sounds like SAW DOH: Informal term which means "operational" or "to operate" in terms of operating equipment. Also, Slang, this meaning refers to a "sadist" or "S&M" in general.
SAIKIN DOU ?: This is how you say "Hows it goin lately ?" This is for people you know already.
SAIKO sounds like PSYCHO: Slang word meaning "the best" or "the coolest!" or "awesome!"
SAITE sounds like SIGH TEH: Slang word meaning "the worst" or "it's the pits" or "crappy".
SA'NARA sounds like SAH NAH RAH: Colloquial term that is short for SAYONARA.
SASUGA sounds like SAS GAH: Informal term, (not slang, but is used a lot in anime so I'll include it) This is used to say that, "(somebody) did something good, or they did a good job, just as you would expect"
SAYO sounds like SAH YO: Interjection meaning "it's true" and is another way of saying SO KA if you use the words SAYO KA.
SHAKUHACHI: Slang, literal meaning is a "bamboo flute or clarinet" but is used to refer to "oral sex given to a man"
SHIKKARI SHITE sounds like SHEEKAH REESH TEH: Informal phrase meaning "be strong" or "get a hold of yourself" or "be confident".
SHIMATTA sounds like SHIH MAH TAH: Informal term simply meaning "damn it!"
SHINAI sounds like SHE NIGH: Informal word which usually means "don't do" but actually in some uses, possibly more by women, it simply replaces NAI which means "none or no". You mostly have to figure this out by using the context of what is being said.
SHISHI-ODOSHI: Standard term for the common garden water fountain that is made out of bamboo seen in many anime movies. It means "deer scarer". This is the thing that makes that "clack" sound.
SHOCK: Loan word used to express "shock" or disbelief.
SHOGANAI DARO sounds like SHOW GAH NIGH DAH ROH: Informal phrase that expresses the feeling that something is hopeless and you might as well stop resisting and just go along with it. It is like saying, "OH, what's the use...?"
SHOKIN KASEGI sounds like SHOW KEEN KAH SEH GEEH: Informal phrase meaning "bounty hunting". SHOKIN is "reward" and KASEGI is "earnings".
SHOKIN KUBI NI sounds like SHOW KEEN KUU BEE KNEE: Informalphrase meaning "bounty" or "reward". KUBI is "neck" so it means that "there is a reward in your neck".
SHUSSE HARAI sounds like SHOE SEH HA RYE: Informal phrase meaning "success payment". It is used to indicate that you want to buy something on credit. It is normally used as in "I'll pay you when I score big!".
SHINAKUCHA: Colloquial usage, short for "shinakereba naranai" which means "must"
SO DESU NE sounds like SO DEZ NEH: Informal phrase with many meanings. The first meaning can be "It is, isn't it?", another meaning can be "I see...", or "It seems to be that way" or "I think it's true (because of what I know from other people)". Also, you will hear this phrase a lot in television interviews, it seems to be a popular habit, and is probably a polite way of letting the other person know you are listening to them.
SO KA sounds like SO KAH: Informal phrase which can mean "really?" or "I see..."
SON'NA sounds like SO NAH: Interjection which means "no way!" or "that can't be!". This word is normally found in dictionaries, but doesn't seem to include this translation.
SORE GA, DOSHITA? sounds like SOREH GAH DOSH TAH: Informal phrase which translates as "so what?!"
SORO SORO....: This is a somewhat polite way to say "Umm....I gotta get goin ok? " The complete phrase is "Soro soro oitoma o....."
SO SO sounds like SOH SOH: Interjection usage translates as "Indeed!" "By the way!..." "Come to think of it!"
SUGE sounds like SUU GEH: Slang term meaning "cool!" or "awesome!". It is slang for SUGOI
SUKOSHI WARUI NO JA NAI sounds like SKOSH EE WAH RU EE NO JAH NIGH: Informal phrase which best translates as "not too shabby". Literally means "it's not a little bit bad"
SUMMAN sounds like SUU MAH: Informal term, short for SUMIMASEN. SUMIMASEN can mean "I'm sorry" or "thank you", but SUMMA is generally used to express regret.