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1.
wiping feces on the page of a book
Jay was mad at Dave so he took his anatomy book into the bathroom at left a Buffalo bookmark on the day's assignment.
by matthew rivers June 08, 2007
 
2.
marking the page of a book or other publication with feces.

Taking a book off the library shelf and bringing into the bathroom to smear shit on a page

Angry at his friend, he took his science book and put a buffalo bookmark on tommorrows assignment
by matthew rivers June 16, 2007