giggle
1. [ verb ] laugh nervously
Synonyms: titter
Examples:

"The girls giggled when the rock star came into the classroom"

Related terms: laugh giggler
2. [ noun ] a foolish or nervous laugh
Related terms: laugh
Similar spelling:   Gisele
  gigolo
  giclée
  Giselle
  guggle
  goggle
  gaggle
  Giglio