Person 1: I won't even deal with (lisa), she'll screw you in a second, and won't think twice.
Person 2: Sounds pretty bad.
Person 1: Oh, yeah. She's the megabitch.
Usually used by old Indians/Pakistanis as an obscenity (usually directed at white people). Coined from the term "son of a bitch", this south-asian derivative has the same message, yet combines an undeniably funny accent.
"Allo?"
"ummm hey...may I please speak with Sharanjit?"
"Who's dis?"
"...It's his friend Mark..."
"listen you sun-mabitch....you call my house one more time I call police....you vucking bestard!"
"umm.....so he's not home???"
This word is used to describe a girl who takes being a bitch to a whole new level. Although the regular word to describe this kind of girl is "megabitch," this particular girl is the leader of a group of bitches (who can be referred to as bitchcepticons.) The word is derived from the words "megatron" (the leader of the the decepticons in transformers), and "megabitch."
Guy: "Oh that girl is such a bitch, and it's only because she has a big ass!"
Girl: "I know! She's a megabitchron! I hate her and her bitchcepticons!"
In Puerto Rico when you are using the term literally:
mama = suck
Bicho = dick
When you are using the word in the middle of a discussion, or when referring to another person as a mamabicho not in a literal way, the word is used as an insult towards someone that is corrupted, selfish, liar, politician, thief.