NS is often used by younger people all around the world who think, what you've told them isn't interesting or isn't anything they wouldn't do.
It's the short version of "nothing special".
A: "hey dude, yesterday I crashed my parents car into my grandpa's house"
B: " dude that's ns, I did that with a plane last week"
A:"well, I guess you are just better than me"
B: "guessed right!"
Nationale spoorwegen, or in English Never Service (NS) Dutch 'railway' company. Known for its keenness on defying all your expectations of coming home on time.
Ns
Meaning so sweat, this is to show that the action(s) were of no sweating, sweat less, sweat free (not hard to do) e.g. "ns ill head down to ur meas n ask her fer a quid." or words previously spoken were in no way hurtful or misunderstood e.g."it's ns lad, u must've thought when I said I wanted u to get runover by my deas Ford Fiesta I were being serious."
It can also be used if the words that are misunderstood e.g. "Lad, whenever I said ur bitch is like Henry the Hoover I wasn't messing, what's her name? Chazzy Shankill?"
"ns lad, I promise d make sure ur burd is all gud while ur away to Ben Nicky n she's at me free."