A Bantu people of Tanzania.
"The hehe tribe has a rich cultural history in northern Tanzania."
In plain English: Hehe is an informal way of writing laughter that shows someone finds something funny but wants to keep it quiet.
"The child had no choice but to laugh with hehe at his silly joke."
The language of the Hehe people.
"The anthropologist spent months learning hehe to communicate directly with the villagers in Tanzania."
An approximation to the sound of a giggle.
"After hearing the funny joke, she let out a soft hehe that echoed in the quiet room."
The word "hehe" comes directly from Middle English and traces back to the Old English phrase "he he," which was originally used as an expression of laughter or amusement. It traveled into modern usage with its original meaning intact, retaining its role as a written representation of giggling.