Bishounen: bi=pretty, beautiful; shounen=boy; simply put, prettyboy. Of course...
Now, everyone may have different bishounen characteristics that they acknowledge... for example, most do not accept anyone who has any muscular bulk as bishounen because they lack the delicacy and femenine fragility that is often associated with bishounen... Others do not think that guys with short hair are bishounen because their hair does not move dramatically if at all... Now this is just my own definition of a bishounen... A male character who displays grace and fluidity in character design or movement and personality... Other features like dramatically flowing hair and femenine eyes are also a plus... Other familiar options are slim body frames and being soft-spoken. I'm kinda forgiving if some of the Video Game bishounen are a bit beefy... but they can't be Hulking.... there's a difference...
So... you wanna be a bishounen? Or just want to know the most widely recognized definition of the term? Well here is the site to go to...