Movie with two guys sitting in a pub

hey All,
all I remember from this movie is that there were 2 guys siting in a pub and one of them tries to convince the other one that fat girls are a better sex.
I think it was an American comedy movie.
I also think it was a pretty new movie from the past 10 years.

thanks for your help!!!!

Was it because fat girls don't get it as often, and they go above and beyond?

yeah, I thinks so

Shallow Hal? That's literally the only thing that comes close in my mind.

Yea, that's what I figured. I have no idea about the movie though.