Meaning

adjective noisy like the sound of a bee

originFrom a- (prefix indicating a condition or manner) + buzz (“feeling or rush of energy or excitement; major topic of conversation; widespread rumor; information spread behind the scenes”) or buzz (“to show a high level of activity and haste; to communicate in an undertone; to spread, as a report, by whispers or secretly; to talk to incessantly or confidentially in a low humming voice”).

Etymology from Wiktionary, CC BY-SA 3.0