A young person, usually female, usually of a preppy, perky, trendy nature. Online, they 'type lyke dis' and are fond of (or are too stupid to use anything else than) slang such as 'u' 'r' 'ur' 'y' 'wut' and put a z in replacement for an s. Despite what some of the other definitions say, a teenybopper likely would not play DDR or use faces such as 'O_O' for all people who do the above, in their right minds, despise teenyboppers. Like me.
Teenybopper: a/s/l wutz up ur so kewlies lolz
Me: What the hell. -_-;;
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.