A derived unit of measurement taking into account actual weight, dimension, proportion, and of being at least 15 pounds too heavy.
Person 1: Dude, why are you so weird?
Person 2: My big sister used to sit on me when i was a child.
Person 1: So?
Person 2: So she's like ten years older than I am and weighs a fuckton more than I do.
Person 1: Damn...