Definitions by Craig Ryan

Hahn 

A laugh created by Sean Thoman and coined by Craig Ryan, is a laugh which is unexpected, ceased early, and performed by using two overlapping partials of the voice. It is sometimes performed when at a loss of words due to an unexpected greeting or question.

Person: "Hey Sean. How was your summer?"
Seany: "Hahn."

Hahn by Craig Ryan August 30, 2004