OP
You guys sound like a couple that just broke up, him leaving his stuff at your house, you complaining to others about how much of a turd he is, its adorable.
Just give the jacket back man if he wants it and tell him to fuck off and leave it at that.
You start jizzing on his stuff and you'll end up starting a retarded feud/fight that'll last for I don't know how long. You'll continue to have to deal with said jackass, and in the end you'll never get rid of this "scrawny cunt". If anything you'll end up starting a jizz fight and that'll just turn into a gay orgy of sorts down the road, so think about it. Unless you want to get gay with your ex, sorry "ex-bestfriend"