J.K. Rowling's Son Gave Her the BEST Birthday Present

I think we can all agree that this is an unacceptable gift from a son to his mother on her birthday. pic.twitter.com/yYUdiIDnKI

— J.K. Rowling (@jk_rowling) July 31, 2016

We have no idea what we'd give J.K. Rowling — aka our favorite Muggle — on her birthday, but it looks like her son totally nailed it. Her 13-year-old son gifted her a slightly inappropriate mug that features an owl saying "F*ck off" and "Irritable Owl Syndrome" at the bottom. Too good, right?!

Rowling called it "unacceptable," but we're pretty sure she loved it. Where can we get one?