BillyHO is a nickname for a boy named billy or will, he’s a hot (usually blonde) dude that will date many of girls before finding a person he really loves, he will pare well with girls who’s named start with a S. She will say I love you to him first. BillyHO is hilarious and sweet! He is a bit agressive but popular because he’s just awesome. Good for you if you get a chance to meet one of the guys.