A dango is a person of the female sex who is attractive from a distance but unattractive up close.
A combination of the words "Dang" and "Oh" because from a distance, the response to the female is "DANG!" When she approaches, however, the new found appearance of the female makes the male say "OH!" in disgust.
I saw that girl over there, and she looked good! But when i got up close, I realized she was ugly. I swear, I am getting rather tired of all the dango's around here.!