A man dressed as a unicorn. (because a man already has one built in 'horn' and adding another, makes two=duo horns)
by seaprincess November 21, 2012
A word that @maamlikesbondage uses even though they don't know the definition and get awfully defensive about it.
"They're asking to meet a duocorn, but they won't say what it is because they don't know what the word means."
by Elder Morgan February 20, 2021