They have no concept of what being in shape is either. I know a guy who is a ripped 185lbs at 5'9". This slob who is 230 and couldn't run around a block without keeling over said he's so much bigger than him. Yes, if you are talking about sloppy weight.
I learned this long ago. Guys are delusional about what they look like.
Have you ever watched a football game and they say a players 6'3" 260lb and some slob friend says I got 10lbs on him?