Any low-pitched buzzing sound that lets you know you've done something wrong, like the ones that:
1) let you know that you did not allow enough time for a document to download on a computer;
2) let you know that you have no money or not enough money to get on a bus or train;
3) continuously go on and off to let you know that you've dialed a wrong number on a phone;
4) make a loud sound to let you know that you've made an incorrect answer at a game show;
5) buzz to let you know that you've made an incorrect move, a disqualification, or lost a turn on an electronic game;
6) etc.
1) let you know that you did not allow enough time for a document to download on a computer;
2) let you know that you have no money or not enough money to get on a bus or train;
3) continuously go on and off to let you know that you've dialed a wrong number on a phone;
4) make a loud sound to let you know that you've made an incorrect answer at a game show;
5) buzz to let you know that you've made an incorrect move, a disqualification, or lost a turn on an electronic game;
6) etc.
I had to ask some passengers for change on the bus because the card reader let out a bap when I put the card into it.
by pentozali January 7, 2012
Get the bapmug. 
by ChunkyBenis October 10, 2022
Get the Bappedmug. by Proper use of the word April 10, 2021
Get the Bapmug. by Bap January 23, 2015
Get the bapmug. by noob_boy69 January 9, 2008
Get the BAPmug. Male version of bop. A male referred to as a "man whore", and often bounces around from girl to girl
by The seed December 14, 2012
Get the Bapmug.