What is bi-curios?

Answer 1

Bi-curious is when you feel attracted to someone of the same sex but you're attracted to people of the opposite sex too

Answer 2

There seems to be a typo in your question. If you meant to ask about "bicurious," it refers to someone who is curious or open to exploring their attraction to people of more than one gender, typically when they identify as straight or gay. It can be a stepping stone to understanding one's own sexuality.