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1.
Nio
"no" or "Know"
Why I don't Nio

NIOOOOO!!!!
by krugball February 20, 2004
 
2.
nio
the coolest guy ever.
nio will be at this party tonight. AWESOME!!!
by zsix February 28, 2011
 
3.
nio
An emphatic term of opposition to a given proposal. An utterance from a bratty boy or girl.
by Brunnyhead September 24, 2009
 
4.
1. agreeing/aknowledging something.
2. a greeting.
3. describing something - add ly
4. used in conjunction with murr
5. can be added to the end of a word to give it greater meaning
1. going to the movies tonight?
nios
2. dude!
nios!
3. we did it niosly
4. lets murr niosly
5. that shit is phatinios
by Baer September 21, 2003