Answer: hehheh

AnswerCrossword Clue
HEHHEH

"I'm so clever!"

HEHHEH

Dastardly chuckle

HEHHEH

Snicker sound

HEHHEH
Dastardly laugh
HEHHEH
Cynical laugh
HEHHEHSneaky laugh
HEHHEH"Beavis and Butt-Head" laugh
HEHHEHSnickering sound
HEHHEHLaugh from Beavis