A phrase used on Internet forums to counter the vast range of unverifiable claims made by users. Often these claims involve personal brag-worthy accomplishments, extraordinary or rare sights/occurrences, and tales relating to alcohol or drug use.

A phrase used primarily on online forums stating that the person refuses to believe the thread creator's claim unless it is shown by a photograph for proof.
A: Yo dawg my hair is getting so long.
B: Yeah broseph, cut that shiz!
A: Actually, i shaved it like 20 minutes ago.
B: Now way?! Pics or bs!
by Austinrulezd00d November 22, 2009

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