1. titter - Noun
2. titter - Verb
To laugh with the tongue striking against the root of the upper teeth; to laugh with restraint, or without much noise; to giggle.
A restrained laugh.
To seesaw. See Teeter.
Source: Webster's dictionaryGeorge Bush made a mistake when he referred to the Saddam Hussein regime as 'evil.' Every liberal and leftist knows how to titter at such black-and-white moral absolutism. Christopher Hitchens
The girls giggled when the rock star came into the classroom Source: Internet