Who do you think you're kidding?

Who do you think you're kidding?

Inf. You aren't fooling anyone.; Surely, you do not think you can fool me, do you? Bill: I must pull down about eighty thou a year. Bob: You? Who do you think you're kidding? Mary: This carpet was made in Persia centuries ago. Tom: Who do you think you're kidding?
See also: think, who
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