Form-Correction Warrior

The douchebag at the gym or fitness club who can't help it but give advice to others on their form of exercise, diet or workout routine when they are not asked for it.

Hey Samra, do you see this guy over there at the treadmills? He keeps coming to me when I'm working out giving me some random advice on my form, ugh, he's such a Form-Correction Warrior.