Answer:

hunh

Answer	Crossword Clue
HUNH	"What was that?"
HUNH	What did you say?: Colloq.
HUNH	Colloquial exclamation meaning "what?"

HUNH	Querying interjection.
HUNH	Interrogative interjection.
HUNH	Snorting sound
HUNH	"Whadja say?"
HUNH	"What the ...?"
HUNH	"Come again?"
HUNH	"Pardon?"