When you do an activity you're interested for an extensive amount of time, often pulling several all-nighters and focusing on that activity.
Person 1: "Yo, you gunna freshmen tonight?"
Person 2: "Yeah when I get home I'm gunna play Guild Wars (video game) all night"
Person 1: "Damn, we have a lot of homework tonight"
Person 2: "Yeah man we gotta freshmen homework"