“Y U NO” Guy (also known as “Y U NO [X]?”) is an image macro series using SMS shorthands and carefree grammar as a way to bring someone’s attention on a particular subject or issue. The unique facial expression worn by stick-figure character is believed to have been traced from the Japanese sci-fi manga / anime series Gantz. the meme is also very popular on memegenerator. The phrase "Y U NO" is an internet or mobile phone slang which literally is shortened out to "Why Don't You". it is possible that the person who published the picture may have invented the text or maybe it could be that the text phrase was used before it's time.