you look fat and not even that big
Sure, I'll bite. It's actually something I have heard before. Most absurd one was when at a bench meet, a monster of a dude came walking up to me and told me that I had to get out of the warmup room, because he needed the space and the middleweights weren't lifting until 2 hours later. Was fun telling him that not only did I outweigh him by 10 Lbs, my opener was 80 Lbs higher than his.

So yes, I don't look as big as I am. Salesmen in clothing stores also always underestimate my size. "Sure we have your size, let me get a 58 for you. Oh. Let's try a 64. Hmm... Well... seems like we have nothing in your size."

Probably because I don't train for size per se, and my arms and delts are lagging.