A bisexual person that has features of "bae material". May be reffered to personality, or sometimes even only looks, not depending on person's sexual orientation.
Example 1: Sasha came out as bisexual yesterday. She's so sweet and nice, she likes to cuddle and is always there for me... She's so baby bi.
Example 2: I got my new hairstyle today and the barber cut my hair so short that I look way too baby bi for my standards.
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