Hangman word!

My one professor friend who I play hangman puzzles with was excited when I texted her that the new issue of my puzzle magazine was in, and hangman this month was "2 word phrases", so we were texting each other back and forth possible 2 word phrases such as "brass knuckles"...

My favorite was her suggestion "fuck buddy", since it would probably look like this after a person took up a lot of guesses on vowels -

_ U _ _ _ U _ _ Y

- and no one would be able to get it, since the consonants are obscure (n.b., word divisions are not indicated, you have to figure them out).