パクパク/ paku-paku [pa-ku-pa-ku]
1. Japanese. The onomatopoeia of chewing noises or the sound of a mouth opening or closing.
EX. Did you know that Pacman was originally called Pakkuman as a reference to the Japanese paku-paku? Then, the character and game became Puck Man as a reference to the character's hockey puck like shape. Finally, after the game was re-released by Midway, in the states, they renamed the character and game to Pacman.