It is an acronym for the phrase eat sleep beat my meatrepeat.
also Pronounced ESS/BUMM/ERR
BOSS: Hey man, what are your plans for your day off?
ME: E.S.B.M.M.R.
BOSS: Ok well I'm not familiar with your childish lingo, could you speak English?
ME: Eat sleep beat my meat repeat
BOSS: way to use your off time to be productive
ME: Fuck off
BOSS: You're fired
ME: See you Wednesday
this stands for : be my bad boy be my man be my weekend lover but don't be my friend. It stems from the lyrics of the song 'Bad Boy' ~ Cascada. It became a widespread trend within the Gacha community using the format of "'It's always but never b.m.b.b.b.m.m.b.m.w.l.b.d.b.m.f...'"
Npc 1: bro its always 'I wuv you lovebug but it's never b.m.b.b.b.m.m.b.m.w.l.b.d.b.m.f...
Npc 2: Girl wtf i just asked about how your day went
b) a new and improved acronym for 'in my moralitybook', i.e. morally speaking, according to me.
a girl comes home from school during a rainstorm, and starts screaming,
"yoohoo, parents, get my dinner ready, I'm going to a friend's house later.
father, from the living room: young lady, i.m.m.b I won't stand for it. Kodem koll, take off your raincoat, shower so you don't schwitz cuhm a chaizer, then, comme du monde, improve your vocabulary.