Etymology From Middle English tehee, te he, ti he, alteration of hehe, from Old English he he (“hee hee”).
1
The sound of a giggle.
She […] hath ſtiled him with an immortall penne, the bawewawe of ſchollars, the tutt of gentlemen, the tee-heegh of gentlewomen, the phy of citizens, the blurt of Courtiers, the poogh of good letters, the faph of good manners, and the whoop-hooe of good boyes in London ſtreetes.1593, Gabriell Haruey [i.e., Gabriel Harvey], Pierces Supererogation: Or A New Prayse of the Old Asse. A Preparative to Certaine Larger Discourses, Intituled Nashes S. Fame, London: […] Iohn Wolfe, →OCLC; republished as John Payne Collier, editor, Pierces Supererogation: Or A New Prayse of the Old Asse. […] (Miscellaneous Tracts. Temp. Eliz. & Jac. I; no. 8), [London]: [s.n.], [1870], →OCLC, page 181:
Tee hee! Isn't that naughty?1980, Bill Oddie, Bill Oddie's Little Black Bird Book, page 97:
tee hee
verb
Etymology From Middle English tehee, te he, ti he, alteration of hehe, from Old English he he (“hee hee”).
1
To utter tee hee; to make a high-pitched laugh; to titter.
That was more than could be said for those two bastards tee-heeing away over there by the bookshelves.1956, Anthony Burgess, Time for a Tiger (The Malayan Trilogy), published 1972, page 70: