This is a highly overused reply used in chat rooms and message boards when something funny has just been stated. If you use this reply, you're probably a complete moron and you need to turn your computer off once in a while.
Jimmy: Oh shit, I got semen in my eye.
Larry: bwhahahaha
Jimmy: That's not funny, it burns!
What a person says before starting their plan for world domination. Usually means someone that they tied up in an alligator pit and then escaped will stop the plan. Can also be a sign of madness, bad writing or a mixture of the two.
"Bwhahahaha," the evil doctor says,"No one can stop me now that I've tied up KarmaJustice in my laser-sharktopus and scary kittens room!"
a form of "what", to be used when also suggesting or asking "but...?" simultaneously. especially in response to a narrower-minded, ignorant, or less-informed statement or expression. also, especially to be used with Indian or Spanish accents pronouncing "w" as "v" or "b" as "v", respectively.
Maya replied, "?bwhat...?" when the U.S.A. president declared building a wall on the U.S.A./Mexico border.