singing: lyrics that are just unreasonable and bitchy (see: disturbia by rihanna, irreplaceable by beyonce), refusing to hold a note, having to fluxuate constantly (see: Mary J Blige, Alicia Keys)
dancing: excessive hipshaking (see shakira), covering yourself with some weird substance while you dance (see shakira again)
personality: acting remotely like rihanna, being "badass"
mostly refers to pop stars
"Did you hear umbrella? I've never heard anything so baishy."