To "man up" in a sense and perform a difficult task at any cost, anything from single handedly defeating an opposing team or finishing two large pizzas in one sitting. A team is not necessarily involved. May also refer to an awe inspiring act of epic proportion.
Person 1: "Wow, there's no more soda left so you're gonna have to finish your bottle of Captain straight."
Person 2: "I don't think I can do it dude!"
Person 1: "You have to, we gotta get rid of this tonight!"
Person 2: "Fuck it, I'm gonna put the team on my back and just chug it all."