Guy (or girl) who is sexually curious, not necessarily due to sexual preference, but rather due to environment, peer pressure, predominance of alternate lifestyles in immediate surroundings. (From the adage "Monkey see, monkey do.")
"That bi-curious george is only interested in a quick one-night stand before going home to bone his girlfriend."
Noun, When a man is having sexual intercourse with a woman, and is also receiving anal sex from another man. Preferably the man in the middle wears a large yellow hat.