Answer: yeahsure

AnswerCrossword Clue
YEAHSURE

Sarcastic reply

YEAHSURE

"Uh huh"

YEAHSURE

"Now tell me another one"

YEAHSURE
"Whatever you say"
YEAHSURE
"I bet"
YEAHSURE"Likely story"
YEAHSURE"Whatever"
YEAHSURE"Like I'm gonna believe that!"
YEAHSURE"I bet!"
YEAHSURESarcastic expression of disbelief