Posted by Smokey Stover on August 16, 2005
In Reply to: My foot posted by Susan K. Early on August 16, 2005
: My foot: Origin of exclamatory phrase that expresses total disbelief? In addition to hearing it routinely all of my life (born in 1948), a friend from India says he grew up with it, as well.
The OED cites it first from the 1920s, made popular presumably by the likes of Noel Coward and Dorothy Sayers. Also mentions "your foot!" and assigns the meaning "contemptuous contradiction." Nowadays, people often say "my ass!" with the same meaning. Why foot I cannot say, but perhaps someone knows. SS