When two males perform double anal penetration on a female's (or male's if that's the way you swing) anal cavity and both precede to move away from each other while still inserted, thus forcing the anal cavity to spread, or rip depending on your level of arousal. This can cause feces and blood to spill out onto the "can-opener's" junk. Precede with caution.
when someone asks you a question and you turn your head slowly and mechanically while still looking at your computer screen, book, etc to let them know you acknowledge the question
girl: hey, what do you think of this top?
boy: *does the can opener turn*
girl: hey, i'm talkin to you, dont u can opener turn me, see this is the problem in our relationship....
boy: i heard you, i heard you
Where a guy is having sex a girl and another guy is giving it to the girl anal. The girl moves up and down like a can opener and when both men are about to cum she moves so the "fizz" goes everywhere.
"Did you get your room repainted?"
"No, Jessica, Mike, and I just did the Idaho Can Opener."
the act of double-penetration in a single orifice, usually the vagina
The exact origins of the Turkish can opener are unknown, but I did this last weekend, so we could say that it started there, for historical purposes.
Girl: Owee!!!
Other Girl: WTF mate?
Girl: I'm in major pain, my BF and his BFF did a Turkish can opener on my snooch last night.
Other Girl: Ooh, what's a Turkish can opener?
Girl: One cannot be told about a Turkish can opener. You have to feel it for yourself.