'Gleeking' is a disgustingly weird human function that most people don't realise they can do

You may not have heard of 'gleeking' before, but you'll probably feel disturbed after finding out what it is.

There's actually a high chance that you've done it before without knowing it, but trust social media to make the term go viral and plaster it all over your timeline.

The bizarre action did the rounds on TikTok, with one creator showcasing just how easy it is to do in a viral clip.

The gross trend centres around the act of shooting saliva out from under your tongue - which can often happen when you're yawning.

If you're sat thinking that you are now a 'gleeker', you're right, but can you do it on demand?

The man in the clip explains that only one percent of the human population can gleek on demand, but a medical profession thinks that 'everyone', with some hard work and training, can do it after some extensive practice.

Clear your plans.

Here's the science behind it though, because there's a reason behind why people gleek in the first place.

So, in your mouth, there are three pairs of major saliva glands, as well as thousands of smaller ones.

Two of the major ones are located on the bottom of your mouth - the submandibular glands and the sublingual glands, if you want to know their real names.

When eating, these glands start pushing out saliva and usually any excess drains away through ducts under your tongue.

But sometimes this can build up and the pressure on the glands from your tongue causes it to squirt out.

As I mentioned earlier, this typically happens by accident, but if you fancy giving it a go on demand there are some ways you can boost your chances.

Mark S. Wolff, DDS, PhD, dean of the School of Dental Medicine at the University of Pennsylvania told health.com that eating something sour can help to stimulate your salivary glands - you can then push your tongue out of your mouth, lift it up and curl the tip of your tongue back so it's behind your top teeth.

Dr Wolff told the publication: "If you tense the muscles in the tongue right, it squeezes the duct and saliva squirts right out."

He went on to say 'everyone can do this', but it will most likely take some practice to get to the point where you can do it on command.

Well, what other plans did you have for this weekend?