person who eats and eats and does not gain weight

are few people.

I have such an uncle. I call him a barbecue maniac. The man has the ability to barbecue in every corner he finds, despite all the impossibilities. I gained weight because of it. but the man is not gaining a gram weight.

Fortunately, we lost those kilos now. I shouldn't see him, but I can't stand the barbecue.