Answer: youmustbejoking

AnswerCrossword Clue
YOUMUSTBEJOKING"Get outta here!"
YOUMUSTBEJOKINGDoubter's response
YOUMUSTBEJOKINGUtterance from a stunned comedy club patron?
YOUMUSTBEJOKINGSkeptical comment
YOUMUSTBEJOKINGIncredulous response
YOUMUSTBEJOKING"Uh-uh!"
YOUMUSTBEJOKING"Bad idea!"
YOUMUSTBEJOKING"You're pulling my leg!"
YOUMUSTBEJOKING"That can't be true"
YOUMUSTBEJOKING"You can't be serious!"