When somebody blows their nose on your dick while giving a blowjob, using the snot as lube. Often blowing the cum out of their nose with more snot afterwards.
Man, Kayla has a nasty cold tonight, but that just means she can give me a wicked bablogey
You use it for when you need to fart but you wantno one to hear it
Tom has to let a big one rip in his 4th period lecture but needs a distraction so he instinctively yell BABOOEY everyone turns towards him and he lets a big one rip without anyone knowing