a type of person who doesn't talk a lot except for saying howdy or something, just one or two really simple phrases. despite being quiet, they have a lot of attitude or strong opinions, making them kind of a bitch. this prominent sass yet lack of verbal communication is what makes them a mega b
"Have you seen the new girl? She seems kinda shy."
"Yeah but she's a mega b. Don't wanna get involved with her."
by netko September 6, 2018
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A girl who is ostensibly smart, pretty, and not a basket case.
Charlie: Wasn't Sarah acting like a Mega B at dinner last weekend?
by GarlicHair78 September 28, 2019
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