It means 'banana'. It's used in a group of retarded 15yo polite children from Croatia. Njak njak is actually the sound that banana makes when you're eating it. But be careful, 'šnjak šnjak' means 'banana bread' so don't say 'šnjak šnjak' for a banana.
Person A : What's your favourite fruit?
Person B : I adore njak njak!
Person A : Wtf is njak njak?
Person B : A banana, you know, long,yellow fruit..
Person B : I adore njak njak!
Person A : Wtf is njak njak?
Person B : A banana, you know, long,yellow fruit..
by Blabla3 January 26, 2020
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