A response to a person's completely idiotic and/or obvious deduction.

See sarcasm and captain obvious

It originates from the Sherlock Holmes novels by Sir Arthur Conan Doyle, in which Sherlock Holmes is a detective.

Also "Brilliant Sherlock" and "No Shit, Sherlock"
Person A: Dude! The TV is missing!

Person B: Brilliant Holmes.
by Az the vigilante April 6, 2010