1
general::
Go away, leave. For example, The store owner told the teenagers to buzz off and find another place to hang out. This curt imperative dates from World War I. Also see BUG OFF.
American Heritage Idioms
2
general::
Phrase(s): buzz off
Fig. to leave quickly. • I’ve got to buzz off. Bye. • It’s time for me to buzz off.
McGrawhill's American Idioms And Phrasal Verbs