gwagu
The word which comes out as a sound made by the mouth without opening it. The meaning is unclear because it can mean anything and also nothing. Whoever says it beside the owner of the word/sound is to be hit.
Owner of the word/sound: 'gwagu'
Random person: 'gwagu'
*Owner punches random person while saying 'gwagu' angrily*
Random person: 'gwagu'
*Owner punches random person while saying 'gwagu' angrily*