shǎ​xiào

laugh foolishly

傻笑 shǎ​xiào
laugh foolishly verb
to laugh or grin in a silly, vacuous, or senseless way

He was staring at his phone screen, giggling foolishly to himself.

simper verb
to smile in an affected, self-conscious, or awkward manner

He just giggled sheepishly when the teacher questioned him.

Frequency

Movie subtitles
3.31 per million appears in 2% of films
Written text
3.16 per million

Sources

Definitions
CC-CEDICT