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 Karma Justice 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.