giggles
n. C / U B1 Intermediate US //ˈɡɪɡəɫz// UK //ɡˈɪɡəlz// gig·gles
n. a series of quiet, silly laughs that you cannot stop. You often get them when you are nervous or find something funny at the wrong time.
n. a fit of light, silly, or nervous laughter. Often used in the plural to describe an uncontrollable state of amusement.
The children had a bad case of the giggles during the movie.
Even though the situation was serious, the two friends couldn't stop the giggles once they started.
A sudden wave of the giggles swept through the back row of the choir, threatening to derail the entire performance of the solemn hymn.
Usage
Commonly used in the plural form ('the giggles') to describe a state of being unable to stop laughing.