Music: The abbreviations "BM" are known amongst metal enthusiasts as Black Metal. The same follows for it's widely unknown subgenres USBM (United States Black Metal) and NSBM (National Socialist Black Metal). Although, NSBM itself is hotly debated whether or not it belongs to the older BM idealologys. Any other abbrevations outside Black Metal's offspring are considered to be jokes.
by _aeon July 7, 2006

by deddyjazz_ January 4, 2021

Kayla: Wow that was a huge BM by Claire.
Chris: Do you mean bowel movement or bitch move? Your sentence was pretty hard to decipher.
Kayla: Bowel movement. Claire just took a huge dump.
Chris: But I though girls didn't poop?
Chris: Do you mean bowel movement or bitch move? Your sentence was pretty hard to decipher.
Kayla: Bowel movement. Claire just took a huge dump.
Chris: But I though girls didn't poop?
by thecabbageninja September 26, 2011

Used in south Dublin area to show gratification to their peers.
“Gary did you see Johnny last night what a BM”
“I know Jordan such a BM”
“Gary did you see Johnny last night what a BM”
“I know Jordan such a BM”
by The BM March 31, 2019

“Brushing my shorts” similar to smh however it is far more complex and has a greater meaning than bmp (however very similar)
by Shortsbrusher March 8, 2020

going through a BM rn
by imabittystoned January 9, 2023

by Metalest of squirrels December 15, 2018
