1) Affected laugh 2) Chuckle 3) Giggle nervously 4) Guffaw, junior 5) Half-laugh 6) Laugh 7) Laugh nervously 8) Laughter 9) Nervous giggle 10) Nervous laugh 11) Self-conscious giggle 12) Self-conscious laugh 13) Snigger 14) Suppressed guffaw 15) Tee-hee 16) Tehee 1) Giggle 2) Hehe 3) Laugh 4) Tee hee 5) Tehee 
• (n.) A restrained laugh. • (v. t.) To laugh with the tongue striking against the root of the upper teeth; to laugh with restraint, or without much noise; to giggle. • (v. i.) To seesaw. See Teeter.
Tit'ter intransitive verb To seesaw. See Teeter . Tit'ter noun A restrained laugh. 'There was a titter of . . . delight on his countenance.' Coleridge. Tit'ter transitive verb [ imperfect & past participle Tittered ; present participle & verbal noun Tittering .] [ Probably of imitative origin.] To laugh with the tongue striking against the root of the upper teeth; to laugh with restraint, ...
[n] - a nervous restrained laugh
noun a nervous restrained laugh
laugh nervously