When the new law was proposed, we began hearing arguments from both the 'pros' and the cons. [=from the people who supported it and the people who opposed it]
Congress weighed the 'pros and cons' of the new tax plan. [=the arguments for and against the new tax plan]
The governor has taken a 'pro-choice' position. = The governor is 'pro-choice'.
(..) the Avengers down here, we're through. You're out there wearing that goofy thing, lighting up cars... ...calling yourself the Shocker. "I'm the Shocker. I shock people." What is this, pro wrestling? Ah, whatever, old man. Come on. Look. Look. I know you don't give a crap about anything. (..)2017 Spider-Man: Homecoming