giggling
adjective
[ ˈɡɪɡ(ə)lɪŋ ]
• laughing lightly and repeatedly in an excited, nervous, or silly way.
• "three young, giggling girls"
giggle
verb
• laugh lightly and repeatedly in a silly way, from amusement, nervousness, or embarrassment.
• "they giggled at some private joke"
Similar:
titter,
snigger,
snicker,
tee-hee,
give a half-suppressed laugh,
chuckle,
chortle,
smirk,
sneer,
simper,
Origin:
early 16th century: imitative.