Assbark forms in a pair of underwear where layer upon layer of skidmarks have been built up until it resembles the approximate color and texture of bark.
"My wife still throws up every time she has to scrape the assbark off my shorts."
A common abbreviation for All Star Batman and Robin. The title of the book abbreviates to ASBAR, which was changed by readers to ASSBAR, as the quality of the book was far below expectations from a Batman book, especially a Batman book written by Frank Miller.
"What would you say is the worst comic book ever written?"
"Oh man, ASSBAR is easily the worst thing ever written."
"At least it gave us The Goddamn Batman."