Answer: sezwho

AnswerCrossword Clue
SEZWHO"Oh yeah?!"
SEZWHOWords after "Oh yeah?"
SEZWHO"Oh yeah ... you and what army?"
SEZWHO"Oh, yeah?"
SEZWHOQuestion following "Oh, yeah?!"
SEZWHOGruff rejoinder
SEZWHOInformal response to a dubious claim
SEZWHO"Oh yeah?"