(noun). A person who is trying to appear cuter than he or she really is. Despite the endearing sound of the phrase, 'panda-dog' is generally has a negative connotation.
This term was first coined from the actual and controversial Panda Dog phenomenon originated in China where people would dye their dogs (usually of the Chow Chow breed) to resemble a young panda cub.
I can't believe she's 40 and dresses like she's in freaking "High School Musical". I can't stand her little girl tantrums and whining. I'm never going to date panda-dogs again.