This is my page on the yellow :p face. If you want to find out more than what I have said, and see the different way it is shown on different devices,please visit the Emojipedia page on the :p face .
The yellow :p face shows a face with a tongue sticking out, to represent things being funny or not taken seriously. Like many other emojis, it is represented differently on different devices. On an apple device, there are many different types of :p emojis. Some are winking, in some eyes are wide open, and in some, the two eyes are represented by less than and greater than signs.