Top Definition
NSS
No shit, Sherlock.
Oh...Macs don't have DOS, do they?
No shit, Sherlock.
by KiwiKittyBoy April 27, 2004

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NSS
No Shit Sherlock
Adam: I think I am becoming older.

Joel: NSS
by Don Edwardton October 31, 2011

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NSS
Acronym for: "No Shit, Sherlock"
Used when someone states the obvious.
Teacher: Pop quiz time!
Dude: But you didn't tell us we were getting a quiz.
Dude2: NSS. "Pop" Quiz...
Dude: ohhhhh... wut?
by Jowell_ja November 29, 2016

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NSS
A kind of sleepover that involves a girl that just wants to cuddle and a guy with an uncomfortable boner all night long.
Polsy and Heller had an NSS last night?

Did they ... ya know?

No, dude it was a NSS. Non sexual sleepover.

Oh, thats gay.

Exactly!
by HellerKeller69 April 05, 2010

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NSS
Noun. An abbreviation for the medical term: Nasoom Sleepless Syndrome. This term is considered to be out of date by many experts in the field and hence has lost its place in the modern medical texts.
Doctor: I'm afraid your symptoms are consistent with NSS, or Nasoom Sleepless Syndrome. I will prescribe you some Ambien, it should help you regain your normal sleep pattern.
by tictocdoc April 23, 2011

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NSS
Non Sexual Sleepover
Hey i had an nss last night. This girl was so prude.

That girl has a tattoo on the lower back, she definitely does not nss.
by Chu face April 03, 2010

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nss
The sound of "techno" and related music. Also can denote this music itself.
Darrell: What does Jon's techno music sound like?

Royce: What do you think? Nss nss nss...

Hey Bob did you go nss'ing last night?

God that nss is so annoying!
by Darrell Trapp December 05, 2009

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