Definitions by blackthugshaker123

MSB 

The term "MSB" means MumSBrain, similar to mumslife it's used to signify that you aren't lying about something.

'Yo bro have you seen that girl with the fat ass'
'MSB i saw it, it was hugee'
'MSB it was huge and juicy'

MSB by blackthugshaker123 September 3, 2025