"Oo-er" is a term apparently started by the popularBritish series "The Confessions of Georgia Nicholson". In the books, the phrase is used whenever someone mentions something scandalous or neat. It can also be used whenever something suggestive has been said, intentionally or unintentionally.
Rosie: Actually, Sven and i have gotten to number 8 (upper-body fondling in bed).
Japonese torture technique known as "Ranlofan". The testicles are removed from a criminals scrotum, and the eyes are removed from his head. The testicles are then placed in the eye sockets, and the eyes are sewn into his scrotum-- all while he is awake.
"In punishment for molesting midgets, I condemn you to the old switch-er-oo!"
"NO! ANYTHING BUT THAT! PLEASE!"