Is it bad when boyfriend's friend says I have a fat ass?

So, the other day I was at my boyfriends house and his older guy neighbor probably in his mid 20's left him a message on his phone saying " ...eyy and there some chic with a fat ass walking into your pool area" my boyfriend showed me and we thought it was funny, but when actually I didn't know how to take it . I'm short and could loose a little bit of weight ( 5 to 10 lbs) . but did his buddy mean it in a bad way or as a compliment and/or should I be embarrassed ? and I'm pretty sure some of his other closer buddies heard the message as well. so I don't really know what to think of the situation please help?!
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+1 y
( my ass isn't crazy big either normal nice bubble but )
Is it bad when boyfriend's friend says I have a fat ass?
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