The act of vigorously performing oral sex on a woman. Your face is buried so deep into her that her labia is up to your ears...hence you are ears deep.
My girlfriend likes it when I go ears deep. It makes her cum.
The Pabst Blue Ribbon (PBR) flu is a term for being hungover from drinking too much beer the night before.
I drank too much last night and now I have the PBR flu!