someone non-chinese who's immensely obsessed with the country of china. this may also include people who brag about their small percentage of chinese ancestry despite having an even larger non-chinese ancestry. they usually stereotype the country as a "pop culture paradise" and think every chinese person is instantly superior than the rest of the human race for simply "being chinese." because of this, many of them attempt to partake in surgeries for a "chinese look" or may even appropriate chinese culture for a "chinese aesthetic." sinoboo's are so deranged that a large portion of them stalk and harass asian women in the hopes that they're chinese to feed into their chinese fetish.
person A: are you really chinese???
person B: uhhhh, yea?
person A: speak chinese if you're really chinese then
person B: why're you treating me like a dog? and no, i don't know any chinese...
person A: then you're not chinese lmfao
person B: dude are you a sinoboo?
person A: NO I'M NOT !!!! JUST BECAUSE I LIKE DONGHUA DOESN'T MAKE ME A SINOBOO !!!!
person B: i literally didn't mention cmedia at all. and considering you're getting so defensive, it seems i've hit a sore spot