look up any word, like spook:
Abbreviated form of "Wank Bank photos" i.e. photos which upon seeing one stores to ones long term memory in order to recall at a later date whilst masturbating.

Also known as Wank Book photos, refering to those seen on a popular social network.
Friend 1: Have you seen her profile?
Friend 2: Yeah, definate WB photo material!
by CourtneyBoyo January 09, 2011