NSI

The best group of pokemon players the world has ever seen. Lead by their fearless leader Heck.

The members of the NSI often eat beef.

by H E C K August 10, 2018

NSI

No Sarcasm Intended
used when you make a smart Alec remark when you dont mean to be a smart ass.

That is so sad. i think i wanna cry.

Hm. Smart Ass.

Chill man, NSI

by haleymadeethisss May 31, 2011

NSI

No Sarcasm Intended;

When you're texting and you say something that isn't meant to be interpreted sarcastically.

Brett: Dude, I got 1st place in the race!
Bruce: Good for you!
Brett: ...
Bruce: NSI

by TextingNSI August 29, 2013

Nsi

Naval Science Intructor

MSgt. Borland is my NSI. He knows everything.He is a Marine. He is God.

by CPO November 27, 2003

Nsi

Damn Brit.

Look at all the pos, especially Nsi.

by Fect February 6, 2003

NSI

Not so important

matt stop talking bro your NSI

by John owners January 20, 2022

NSI

Nsi is a pro minecraft/League of Legends/Rocket League aaaand CS:GO player.
Rumuor has that he even teached players like Faker on league but when the community needed him the most he vanished. Only if a player is at least top 5 in all the games from the above he can truly call himself as good as NSI>

1: Did you know that NSI teached faker in season 2?
2: Isn't NSI the same dude that disappeared all those years ago?
1: Yeah, such a shame

by ENESAI January 15, 2021