tittering

verb

1. (form-of, gerund, participle, present)present participle and gerund of titter

noun

1. The act of one who titters.

   “The good signor's little address was received in a variety of ways: there were titterings and coughings, and there were also a few instances of noble and generous response to poor Leonard's action […]”

2. A group of magpies.