English idioms. Fu-k a duck.

The expression "Fu-k a duck" is a vulgar and profane phrase used to convey frustration, surprise, or disbelief. It is considered a crude way to express strong emotions, often a combination of anger, shock, or exasperation. However, it is important to note that the phrase contains explicit language and is generally considered offensive. It is advisable to use more appropriate and polite language in most social and professional settings.