Duck to Hero is a term used as a scale measurement. It would be used to compare things.
"On a scale of Duck to Hero, how hard do you think the test was?"
"That swim practice was really Hero, we had to swim a 200 butterfly."
"She's such a Duck! She didn't know what -9+-7 was!"
OMG! Suzy is such a Hero! She is like, the coolest girl in the grade!"
Duck duck chicken is a game you play in localities with a significant, open transgender population (Singapore, Thailand, India, etc.) where you try to guess whether a female appearing prostitute is a duck (biologically male) or chicken (biologically female).
Term by Cristine SimplyNailogical. It's when you get out of the shower and your nails are squishy and soft and easy to be broken because they are bendable.