weight gained in the last year of graduate school as a result of sitting on your ass and writing your thesis/dissertation day after day.
Person A: Has David gained weight? He's looking a little doughy lately.

Person B: Yeah, but it's just the final fifteen. He'll start hitting the gym again after the thesis is finished.
by UCDSocGrad June 4, 2011
Get the final fifteen mug.
Similar to the weight college freshman gain in their first year of college, but this is the 15 pounds everyone puts on during finals week. This can be credited to the amount of coffee and snacks consumed while staying up late studying.
Last night I stayed up until 3 A.M. studying for my biology final; I ate a whole box of Cheez-Its, two Little Debbies cream rolls, and four cups of coffee. Yeah, I am definitely going to gain the Finals Fifteen.
by RUFFLESx December 30, 2010
Get the Finals Fifteen mug.