someone who spends all their time on 4chan's image board /b/.
this person usually knows all kinds of internet words and acronyms such as gtfo, newfag, oldfag, and candlejack (oh shi-).
a /b/tard can usually be seen by their knowledge of all things random, and their knowledge of fellow /b/tards.
gtfo of my /--/ you /b/tard and get back to /b/!
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