To make a low, continuous, humming or sibilant sound, like that made by bees with their wings.

To show a high level of activity and haste (alluding to the common simile "busy as a bee"). Often in the colloquial imperative "Buzz off!"

To whisper; to communicate, as tales, in an undertone; to spread, as a report, by whispers or secretly.

Slightly intoxicated.