look like a drowned rat
To be soaking wet, especially due to heavy rain. You poor thing, you look like a drowned rat! The kids came home looking like a bunch of drowned rats.
look like a drowned rat
If someone looks like a drowned rat, they are very wet, usually because they have been caught in heavy rain. I had no umbrella with me so by the time I got home, I looked like a drowned rat.