Monday: Feeling a little dirty?

Filthy 50 dressed up as 1 min, 45 sec, 30 sec rounds (back-to-back; run 5 laps between rounds).

Jump PU, Swing, Walking Lunge, KTE, Push Press, Good Morning, WallBall, Burpee, Double Unders, Box Jump

Quick, before Livewrong gets to it...what does that "P" on the t-shirt stand for?