buzz in
verb1
Informal To open a remote-controlled door to allow (a person) to enter after sounding the doorbell or buzzer.
- I'm going to buy some more coffee. Could you buzz me in when I get back?
2
Informal On a game show or similar competition, to press the buzzer to provide an answer.
- It was the first contest to employ a "lock-out device": whichever contestant buzzed in first automatically shut the other out.1979, Maxene Fave, Television Game Show Hosts: Biographies of 32 Stars, page 124:
- He disliked the new ruling that contestants could only buzz in after Trebek finished reading the clue.2015, David Baber, “Art Fleming”, in Television Game Show Hosts: Biographies of 32 Stars, page 101: