Someone who frequently and consistently makes minor mistakes. They can be harmful or harmless, but they tend to provoke fierce criticism by other people. A bum may also consistently do harmful things as a joke, oblivious to the obnoxious nature of their actions. Bums often lose important items at inopportune times, and they are always showing up late to meetings.
"Aidan, you lost the receipts we gave you? You bum!"
"The bum Matthew is cheating again and he won't apologize."
"Max didn't submit the grant application on time? That bum!"
"The bum Matthew is cheating again and he won't apologize."
"Max didn't submit the grant application on time? That bum!"
by driversbehindthelines July 19, 2020
Get the bummug. You’re losing primarily because you’ve surrounded yourself with losers. No bums in the scrum over here and we all eatin good.
by Riot Craig July 11, 2019
Get the No Bums In The Scrummug. by Miqoel June 11, 2016
Get the Bum-brow titty fuckmug. Bum narcissists are self-centered people characterized as having an excessive interest in one's arse, the amount of area it takes up and the curvature of it. This is often done whilst simultaneously judging other people's bums.
by Dustydrooper June 13, 2022
Get the Bum-narcissistmug. A bum is the opposite of a demigod. A bum is doesn't know how to do anything, is like a bot, and above all just asinine.
by DeMiGoD_13 August 30, 2019
Get the bummug. by I Am Jack's Medulla Oblongata March 9, 2009
Get the Bum-Stalkermug. 
Get the Bum Whopmug.