to laugh in a silly, often high-pitched way, esp. with short, repeated gasps and titters, as from juvenile or ill-concealed amusement or nervous embarrassment.

a silly, spasmodic laugh; titter.

Slang . an amusing experience, incident, etc.

Going to a silly movie was always a giggle.

noun, verb

cackle , chortle , chuckle , guffaw * , hee-haw , snicker , snigger , teehee , titter , twitter

verb

snicker , snigger , titter

noun

snicker , snigger , titter