quack

(redirected from quackish)
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if it looks like a duck and walks like a duck, it is a duck

If something has all the characteristics of a thing, it is probably that thing, regardless of what it is called or presented as. There are many variations of the expression, and it is often shortened to the first part of the phrase. They say it's not a tax, but if it looks like a duck and walks like a duck, it is a duck.
See also: and, duck, if, like, look, walk

quack

n. a fraudulent physician; a derogatory term for a physician. I won’t go back to that quack ever again!