1) An evil laugh.

2) The sound of a laugh made by a suspicious person, usually one who is plotting an act of destruction against others.
I shall destroy this city and leave it in flaming ruins! Bwahaha!!!
von Anonymous 14. Februar 2004
Evil laughter after you have told your arch-nemesis your evil scheme to take over the world. As seen in many cartoons, movies and videogames.
Lexx Luther to Superman "Now that I have you trapped by my kryptonie field.. I will tell you. I plan on using gigantic moths.. Yes! Gigantic moths to take over the world! Bwahaha!" Superman then somehow manages to get free and beat the crap out of Lexx Luther and foil his mothy plans.
von Firey 15. Februar 2004
1. An irritating instant messager term for laugh that is somewehere between lol and OMGLMFAO

2. Evil villian laugh, expressed in words.
1. "My sister just fell down the stairs! Bwahaha!"

2. "I just blew up Austrailia! Bwahaha!"
von Norapoleon 14. Februar 2004
The evil laugh when in the process of eating... a modification of pwahaha
Bwahaha! I waff at jor abiwity to eef vike a pig vike me.
von Mun-G 17. Februar 2004
An 'evil genius' laugh.
Like the scientists do in old movies when they discover a new poison or some way to transform somebody into a werewolf or something.
von Ellie 16. Februar 2004
imitation of maniacal laughter used in the boo-yah tradition
Bwahaha,you got jacked for your pork rinds and your crack pipe in the same day,ever wonder if you may just be the bottom of the crackhead food chain?
von the tweaker 16. Februar 2004
Curious sound emanating from the mouth signifying hilarity and good humor. Primarily used in web chatrooms with experienced surfers or technically proficient 14 year olds.
In the Chatroom:

George> Heh I smoked a phat one tonite I was off my melon. My wig started spinning out of control...

Dave> Bwahahaha
von Auralgiant 16. Februar 2004

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