acronym for Big Momma Oza.(1) A reference to any woman (usually of African American origin) of sizable proportion who eats fried chicken and screams "OH LAWDY". (2) An insult aimed at one's friend's fat mom. (3) A replacement for your mom. (4) A sexual reference hinting to the fact that you had sex with a voluptuous woman
"Damn yo did you see that woman at KFC"
"Yeah dude she was a straight BMO"
"OMG dude I met this girl at the club last night and sex with her while I was drunk"
"You do know she was a BMO"
"OH Shiiit that explains the black talk and AIDS"
"What did you do last night before the game?"
"Banged that Big Momma Oza so hard"