There's nothing Gen Z loves more than dragging older generations and a social media phenomenon done exclusively by millennials will leave the younger members of your family in stitches this Christmas.

From the skinny jean debate to dating lingo, if a millennial's wearing, saying and/or doing it, you can almost guarantee Gen Z has something to say because, while mere days separate the two generations, they can feel worlds apart.

And the differences between them are rarely more noticeable than Christmas. After all, you can't help but spot your cousins weird habits when you're crammed in next to them at the dinner table fighting over who gets the last roast potato.

This festive season, make sure you take note of how your millennial family members start their social media videos because one big tell in figuring out which generation a person belongs to is something known as the 'millennial pause'.

It's all to do with how you are when you're being filmed. (Getty Stock Photo)

The millennial pause is all to do with how you are when a camera begins recording, more specifically your own camera, when you click record on the front.

It is so common, in fact, that it has its own Wikipedia page, which defines it as 'a pause in speaking at the start of some videos, especially in short-form content and on social media apps such as TikTok'.

So, though it's not just aimed at Millennials, the name has been used to slander them anyway.

You've definitely seen it on the likes on Instagram and TikTok, when someone has started recording a video, they don't cut it at all, leaving the motion of them clicking recording and getting in position in silence.

They then take a beat and begin talking, after which they will probably silently lean forwards and stop recording.

After looking back at that video, they will happily green light it and post it online for millions to see.

Taylor Swift is apparently known for partaking in the millennial pause (George Pimentel/WireImage)

And users on Reddit were split over it being a generational thing, though several comments garnered thousands of upvotes as the conversation got heated.

One person joked: "Well duh, it takes a sec for the tape to engage the recording head."

While another said: "This is obviously because some cameras to this day will have a delay before recording after you press go. it was even worse for phones when millennials were growing up."

A third pointed out: "I know millennials get made fun of, but this is SO much better than the Gen Z style of videos where they always seem surprised that someone (themselves) started videoing them halfway through their sentence."

So, if the dad jokes and family arguments get too much to handle this festive season, make yourself a game and see how many millennial pauses you can spot...