In Terry Pratchett's *Discworld* books (*Witches Abroad* in particular), the character Magrat Garlick is often called a "wet hen" by at least one of her witch colleagues.

Web searches only yielded the phrase [[to be] "mad as a wet hen"](http://www.urbandictionary.com/define.php?term=mad%20as%20a%20wet%20hen). From the description there I think it could mean that she is looking for her "nest", meaning she is trying to get a man, but I am far from certain.

From context in the books I am pretty sure that it does *not* mean she is mad. She does actually seem quite sane, for a Discworld character anyway.

Here are some quotes for context:

> 
> Even Magrat had one [a witch hat], although she hardly ever wore it on account of being a wet hen.
> 
> 
> "That's 'cos you're a wet hen, Magrat Garlick," said Granny.
> 
> 
>