¿estás de cachondeo?

= you must be joking!, you must be kidding!

Ex. The first-blush reaction to their astonishing long-term strategy for achieving national energy independence is that they must be joking.

Ex. To those illogical beings with warped sense of humor, I say, they must be kidding.

* * *

= you must be joking!, you must be kidding!

Ex: The first-blush reaction to their astonishing long-term strategy for achieving national energy independence is that they must be joking.

Ex: To those illogical beings with warped sense of humor, I say, they must be kidding.