A laugh with slight guilt or embarrassment. More often typed than said aloud. Also, it is said by Rikku when she is in the Thunder Plains in the game Final Fantasy X. She is scared of lightning, and starts laughing like this.
Person: What? You really accidentally went into the wrong bathroom??
Person 2: Eheheheh... Um... Yeah. But not on purpose!!
Person 2: Eheheheh... Um... Yeah. But not on purpose!!
by person ^^ May 20, 2004