a nasty wallop
A severe and powerful blow, which may be either dealt or received. I got a really nasty wallop from a two-by-four on the construction site last week. His left hook can deal a nasty wallop if he catches you with it.
be a nasty piece of work
To be a difficult or disagreeable person or thing. His secretary is a nasty piece of work, always snapping at people for no reason. I know you're not excited about this family vacation, but please, don't be a nasty piece of work the whole time. This virus is a nasty piece of work. It's already infected millions of users.
nasty woman
A liberal-minded woman. The phrase became a rallying cry and self-identifier for supporters of Hillary Clinton after Donald Trump referred to Clinton as "such a nasty woman" during a 2016 presidential debate. If I'm a "nasty woman" because I believe in equal rights for women, then so be it!