coo girl

A close cousin of the “woo girl.”
A person who predictably responds to the sight of something adorable by ogling, “awwwwww”-ing, and cooing at it.

Will commonly grow up to be a cougar given their affinity for the adorableness of younger creatures.

“Awwwwwww! Stacy Stacy Stacy!!! Look at that tiny puppy over there!”
“You’re such a coo girl, Fred.”