Booty brows- the line that forms under a woman's butt when it transitions onto her thighs when it is large. It doesn't mean that women who don't have this shouldn't be called 'sexy' as all women are beautiful.
The creases between a woman's booty and her legs. On an extremely sexy woman bootybrows become fleek bootybrows.
P.S. Onision is a cuck.
P.S. Onision is just brave enough to admit he likes what a frig ton of people search on the internet, except he actually admits to liking that stuff. His haters are just jealous because Onision is attractive in looks and personality, and that he has a massive online following.