giggly

verb (used without object), gig·gled, gig·gling.

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

noun

2. a silly, spasmodic laugh; titter.
3. Slang. an amusing experience, incident, etc.: Going to a silly movie was always a giggle.

verb

1. (intr) to laugh nervously or foolishly

noun

2. such a laugh
3. informal something or someone that provokes amusement
4. the giggles a fit of prolonged and uncontrollable giggling
5. for a giggle informal as a joke or prank; not seriously