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1.
The mating call of the Phil, to Nyak one puts there arms like they would do the chicken dance, flaps arms up and down furiously while shouting Nyak. It's gets bitches like nothing else
''Dude that chick is hot how the hell did he get her?''
''He walked up and yelled Nyak like a spaz.''
by Inventor of the Nyak October 21, 2011
 
2.
An abbreviation for 'Cognac', used frequently by rappers.
"I take a sip of that 'nyak, I wanna fuuuuuuuck" - Really Doe, 'We Major'
by Muh'trucka November 27, 2012
 
3.
The expression that one of the The Three Stooges would make.
Ooh a wise guy? Nyak Nyak!
by SMERSH009x February 09, 2006