We spent some time 'swapping stories' about our college days. [=telling each other stories about our college days]
He wanted the window seat so we 'swapped'. = ('Brit') He wanted the window seat so we 'swapped over'.
I'll 'swap' my sandwich for your popcorn. = I'll 'swap' you my sandwich for your popcorn.
(..) You crazy son of a bitch! I'll kill you! Stop! No! Don't shoot him! This guy Eddie, the owner-operator, comes up and says: "I want to swap tires." I said, "These are new tires." "Why don't you throw in something else, like your wife?" His wife was Miss New Jersey . (..)1976 Taxi Driver
(..) These yours? No. But you read the first clue. Randy Professor, naughty student. I blush. Me and my ex just swapped cards. Where's this little brown house? I have no idea. Hello? Nicholas dunne. Under my father's name, William dunne. (..)2014 Gone Girl
(..) And... i got second in that national math competition So.... You're offering us a chance to short this pile of blocks? How? With something called a credit default swap. It's like insurance on the bond, and if it goes bust, you can make -to-. Even -to- return, and it's already slowly going bust. (..)2015 The Big Short