a /b/ tard, or someone who has wasted their life away in the /b/ (random) section of 4chan image boards, who has evolved past poor grammar and a twisted sense of humor and has slowly drifted into a vegetative state where responses are only given to the mentioning of memes and the sight of inappropriate cartoons. (see rule 34)
Basically, a super /b/tard
Normal person: what's up?
Normal person: hello?
u/b/er-tard: ... ungh ...
Normal person: *sigh*... so I heard you like mudkips?
u/b/er-tard: lolz lolz lolz over 9,000!