The awkward moment you mistakenly send your son to school in an obscene Christmas jumper.

Even if you live in Australia where Christmas day is often a scorcher, everybody loves a daggy Christmas jumper. This year, the festive knits were everywhere.

Naturally, this little boy’s parents were only too happy to oblige when his school hosted an ‘Ugly Sweater Day’ and they sent him off to his prep class dressed like this:

Seems like a standard Christmas jumper, right? Lots of Christmas colours, cute little stars, a seasonal greeting and oh look, there's Santa!

Hang on, WHAT IS SANTA DOING?

Let's take a closer look.

Image via Imgur.

On closer inspection, it seems that Santa is urinating. Being the jolly, creative fellow that Santa is, his urine happens to spell out the words 'Merry Christmas.' How...festive?

The worst part is, this little boys parents did not even notice that Santa was being a little cheeky on their son's sweater.

"Accidentally sent my son to school with his newly bought ugly Christmas sweater," the boys parents posted on Imgur. "Didn't realise what Santa was doing until his kindergarten teacher pointed it out when I picked him up after school."

How embarrassing!

Well, at least the boy's jumper would have really stood out in the crowd.