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1.
The long lost art of placing a stick-mag inside a copy of a novel so as to appear to be reading distinguished literature, but in reality providing one with the oppurtunity to further indulge in depravity.
My English teacher was rediculously hungover this morning, so he forced us sit and read Othello, which I book-jacketed with a vintage 1991 copy of Asian Dolls.
by Garry's little miracle May 16, 2011
 
2.
A "Jacket" for a man's "Book". ;)
Matt: Hey Fred, whatcha got down there?

Fred: Oh, just a book.

Matt: Can I see your hard cover? ;)

Fred: Only if you have a book jacket! OOOOOH!!!
by The friend of Matt and Fred January 20, 2010