A performance artist whose sex is biologically female but who performs in the exaggerated style and dress of a male drag queen. Also known as a faux queen. To be honest, that bio queen's performance was so good that I couldn't tell her apart from the drag queens.

One's biological father, as opposed to one's adoptive father (or perhaps other non-biological father figure). I finally found my bio dad by using some genealogy sites and Facebook.

One's biological mother, as opposed to one's adoptive mother (or perhaps other non-biological mother figure). I finally found my bio mom by using some genealogy sites and Facebook.

euphemism A break to urinate or defecate; a bathroom break. I need a bio break, so I'll be right back.