From abbreviations to happy poos, gen Z has strong opinions on appropriate texting behaviour. But can anyone keep up with the ever-changing rules?

Name: “LOL”.

Age: The Oxford English Dictionary first included LOL in 1997.

Not to be confused with: Loll, which is what dogs sometimes do.

So as in “laugh out loud”? Or laughing out loud, though David Cameron thought it stood for “lots of love” and used to sign off to Rebekah Brooks, the former Sun and News of the World editor, with a LOL.