Also found in: Dictionary, Thesaurus, Medical, Acronyms, Encyclopedia, Wikipedia.
really or honestly No kidding, there must have been at least twenty thousand people at the festival.
Truly, seriously, as in No kidding, I really did lose my wallet. [Colloquial; first half of 1900s]
1. Used to express surprise or disbelief.
2. Used to express scornful acknowledgment of the obvious.