Canning Peaches
A slang term for sexual intercourse. It comes from the action of sticking a penis in a vagina or asshole, which is similar to putting peaches and syrup into cans.
Man 1: Me and my girlfriend's grandma were "canning peaches" last night!

Man 2: Really?? Well while you were doing that last night, I was "canning peaches" with your mom!