1. The act of two couples switching partners in the midst of simultaneous sexual congress.
2. Successfully dumping your girlfriend in favour of her sister or roommate.
1. Jane and I were givin er when Jack offered Jill up and we did the old switch-er-oo.
2. Person 1: Yep, as soon as Susan moved in with Sarah, I knew I had to have her, so I gave Sarah the heave-ho and now Susan and I are bumping ugly.
Person 2: Holy shit! You pulled off the old switch-er-oo!
Pretending to be your identical twin (if you have one) to have sex with his or her significant other.
I pulled the Old Switch-er-oo last night on your girlfriend, I didn't realize it was her first time, I tapped that sh*t. Hope you like seconds.
1. To switch your own functionally defunct object another's superficially similar but properly fuctioning object for personal gain.
2. Anything sorta similar to that.
I pulled the old switch-er-oo on my friend's NES with my broken one. It's not like he'd ever play it anyway.
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!"