Head Bitch, the woman in charge of her own world. No one is telling her to play by the rules, instead, she makes her own rules and tells everyone else to follow.
A horny bastard or horny bitch. This depends on the gender of the person that is being called an hb.
1. Ryan says, "I have to watch a movie after school"
Amanda says, "Ok can I come so we can makeout during the movie like we always do."
Ryan says, "Amanda your such an HB......but I kinda like it."
2. George, "look at that phatty booty i wanna go tap that."
Ryan, "George your such an hb cuz you haven't got any in like 6 months bro."