Bio mom countable noun
Used to refer to a biological mother
I am happy because I have found my bio mom.
He was adopted when he was one. He didn't know who his bio mom was.
A humorous way of saying that what one has said is just what they acknowledge and may not be entirely accurate
Mike: Have you returned from your vacation on the beach? Your skin seems to get tanned.
Jenny: My skin is always dark. That's my story and I'm sticking to it!