Clyde Crashcup is a fictional character from the early 1960s animated television series The Alvin Show.

He is voiced by Shepard Menken mimicking the enunciation of Richard Haydn's nasal-voiced character Edwin Carp.

His was the only voice heard in many of the episodes because the other main character in the series was his assistant Leonardo, who only whispered into Clyde's ear.

Clyde's catchphrase was to break down the name of his invention into its metonymic elements to explain his thought process.

In one episode, Clyde invented a wife, voiced by June Foray.