When used by itself:
Usually heard coming from the garage or the basement when your dad finds his tools missing or broken.
Used in conjunction with:
-is wrong with you!
-are you doing?
-is this shit?
after same dad confronts you.
Dad:(finding you with a plunger up your ass)WHAT THE FLYIN' FUCK is wrong with you!
Dad:(finding your stash under the bed) WHAT THE FLYIN' FUCK is this shit?