A word that can be used to describe someone.
This is what you are if you are being a smart Alec, annoying, stupid/dumb, silly, crazy, fat, mean, etc.
It's just a friendly tease, all said for purpose of fun, and with no intentions to insult anyone.
You are such a fatcrap (or fat piece of crap)
A man/and or woman who is so fat they are constantly constipated.
Your mom is such a fatcrap she's been takin' the same dump for 25 years.