it is a term that is compiled of the phrase " Say what now?" but when said really fast it sounds incomprehensible
Person 1: Are you going to the grocery store?
Person 2: saywhatniha?
Person 1: What did you say?
Person 2 I said, "SAY WHAT NOW?"
Person 2: saywhatniha?
Person 1: What did you say?
Person 2 I said, "SAY WHAT NOW?"
by Kalikapeiace January 15, 2006