A single emoji just doesn’t cut the mustard any more, no matter how vigorous its expression; not when you can get cats with hearts for eyes, Roswell aliens, flamenco dancers, lavatories and cable cars (my favourite food item is something that looks very much like a deep-fried prawn. Why?). These more highly developed and extensive version of early emoticons – the :-) and :-( built from ASCII characters and used in texts and emails – have opened up serious new possibilities. The savvy and inventive are now sending entire communications, both public and private and on multiple platforms, in emoji, artfully stringing together expressive little yellow heads with pictures of dancing girls, umbrellas, snowmen, saxophones and aubergines (this probably means something like “signal failure at Thornton Heath. Don’t put the moussaka on until after Emmerdale”). And all in 144 pixels per symbol.
(via Are emojis the world’s first universal language?)