a big sucker
A big sucker is a huge fat guy who either gets his face stuck on a cock or gets his cock stuck on a face.
That guy at the gym is a big sucker and he eats cock like it’s candy.
My uncle is a big sucker and he lets his friends suck him like he’s a big lollipop.
That fat guy at the bar is a big sucker and he gets face-fucked every night.