which features a hand with the pinky and index fingers extended, and signals 'rock on'. However, the addition of the thumb actually completely changes the meaning. Instead, this popular emoji ...

But first you have to know what the emoji even mean, so we asked people who use the images in their online identities. Here's some of the most pervasive symbols floating throughout our Twitter feeds.

So, do you know the meanings behind these 'sinister' emoji? Hover over each character ... (penis), peach (bum), tongue (oral sex), and finger (fingering). However, others will probably surprise ...

An expert has explained the hidden meanings behind emojis that parents should look out for - including the cat face, dynamite and chair emoji. Keith Broni, 35, reveals the images that parents ...