When someone says you have a "fat butt," they are making a comment on the size or shape of your buttocks. The term "fat" in this context is subjective and can be interpreted in various ways depending on cultural norms and personal preferences. It is important to consider the intent behind the comment and how it makes you feel, as body shaming or objectification is not appropriate behavior.
It means he thinks you have a nice butt but doesn't like you.
There is a fine line to whether he likes you or your butt :)
Ewww! here's what i suggest: slap them on the face and say their butt is hard. see how they like it.
That he has no respect for you or sense of humor (if he thinks he is being funny).
Personal preference really, most would not hate a fat butt on a guy.
he is most likely, A. hitting on you B. trying to seduce you or C. just likes your butt size.
This is a rude and inappropiate way of saying he likes your rear end.
In the big mean guy's house. The REALLY big mean one with angry eyes and a fat butt who won't even.... *is killed by big mean guy with a big mean knife behind him*
that means you have a big bahdonkadonk and he likes it!
it means you remind him of his grandma..... your old ugly and fat....jks
It's a good thing. It means you have a nice, athletic ass that doesn't sag or look gross.
It probably means the guy likes looking at the girl's butt.