v. the act of putting on a condom. this euphemism is often utilized when you hook up with a random chick you meet from a night out on the town
Claude: Dude, that heavy drinking last night robbed me of my dignity! I don't know if i can finish this weekend the right way or not.
Brad: I don't know about you, but I think I'm trying to roll one down tonight.
Claude: Actually, yeah, let me shower so I can wash away this hangover. Count me in on that mission!