who's on first

Alternative forms

 * Who's on First
 * who's-on-first

Etymology
From "Who's on First?", a comic routine from 1930s vaudeville made famous by Abbott and Costello, in which two people discussing a baseball team become confused by names such as "Who" and "What".

Noun

 * 1) A situation in which confusion arises due to homophones and similar misunderstandings.