Definition of "BM"

Frequent involuntary urination. Frequent desire for B.M. but no result.

1911, Journal of the National Medical Association

Mr. Jansen stated that he had a medium-sized, soft, formed, brown BM after breakfast today.

2017, Sheila A. Sorrentino, Leighann N. Remmert, Mosby’s Textbook for Nursing Assistants, 9th edition, St. Louis, Missouri: Elsevier, page 424

They used to play Burzumesque BM, but moved on to a Doomy sound.

2000, NivendE, “black doom hybrids”, in alt.music.black-metal (Usenet)

Fans know IdrA for his BM — Bad Manners.

2014, Doug Hendrie, AmalgaNations: How Globalisation Is Good

Bahasa Melayu is the national language and the official language of the Federation, said Dr Noor Hisham. Therefore, one of the entry requirements […] is a pass in BM subject at SPM level or equivalent.

2017 July 3, “‘Medical grads with O Level need only take SPM BM’”, in The Star‎, archived from the original on 5 July 2017

[…] on “National Language Day”, Bahasa Malaysia will be used […] Thursday will be made the day to use BM while Monday or Tuesday for English.

2018 July 14, Ibrahim Isa, quoting Maszlee Malik, “Education Ministry proposes weekly BM and English days”, in The New Straits Times‎, archived from the original on 3 January 2019

The assumption that Malay children are already proficient in Bahasa Melayu (BM) upon entering Year One is incorrect […] But while their command of English is strong, their BM is weak.

2018 December 3, Natasha Joibi, quoting Kadir Jasin, “Kadir Jasin: Language proficiency important, Malay children's command of BM weak”, in The Star‎, archived from the original on 6 December 2018

Life support for BM formatsRobert M. Lowery acknowledges that beautiful music formats are in the decline […]

1983, Television/Radio Age, volume 30, page 72

Practically every dentist or doctor's office carries a BM station.

1988, Donald F. Harvey, Strategic management and business policy, page 300