Answer: HEEHEE

AnswerCrossword Clue
HEEHEE"Pretty funny!"
HEEHEEChuckling sound
HEEHEEMunchkinlike laugh
HEEHEEFacetious laugh
HEEHEEGleeful giggle
HEEHEETitter
HEEHEETittering sound
HEEHEESound of a foolish giggle.
HEEHEEGiggler's sound
HEEHEEImpish expression of delight
HEEHEEGiggle
HEEHEESneaky laugh
HEEHEEThat's a laugh
HEEHEEGiggly outburst
HEEHEE[Look what I got away with!]