tit·ter [1]<p><i>verb</i> give a short, half-suppressed laugh; giggle.
"her stutter caused the children to titter"<p><i>noun</i> a short, half-suppressed laugh.
"there were titters from the gallery"<p>[1] <a href="https://www.google.com/search?q=titter+definition" rel="nofollow">https://www.google.com/search?q=titter+definition</a>