buzz up(redirected from buzzing one up)
To remotely and electronically unlock a door on the ground level to allow someone to come up to a higher level of the building (an act often accompanied by an audible buzzing sound). In this usage, a noun or pronoun can be used between "buzz" and "up." Text me once you get to my apartment building, and I'll buzz you up. Tom, will you go buzz up the courier, please?
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.