While you might assume that a heart emoji just means love, in emoji slang each different colour actually has its own hidden meaning. As Adam explains to his father: 'Red means love, purple horny ...

There's a standard Unicode set of emoji written out, and every handset maker draws their own emoji that corresponds to the character. To use Apple's set, WhatsApp may have had to pay a licensing fee.

Apple's recent iOS 18.4 update introduces eight new emojis, including one that could become a frequently used character for those too tired to text.