Computing and Entertainment
- .bm, the Internet country code top-level domain for Bermuda
- Black Mage, a character class in the Final Fantasy series
- Beast Master (usually in reference to a talent specification for a Hunter on World of Warcraft)
- Beatmania, a rhythm game from the Bemani series
- Blaster Master, a video game by Sunsoft
- Barbie Mariposa, film
- Barbie: Mermaidia, film
- Batman (comic book) and Batman (film), comic book superhero and character in/name of film
- Baby Mama (film), a 2008 comedy film
- Boyer–Moore string search algorithm
- Bad manner, poor sportsmanship in electronic sports.
- Bubble Makers, one of the most feared alliances in the flash game Battle Pirates. This alliance is situated in sector 9, and feasts on the marrow of its victims in sectors 8 and 10
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