Hunk du Jour translates to "Hunk of the day" in French. It is the name of a popular gay blog (www.hunkdujour.com) which also uses the term as a trademark.
Du jour means of the day. as in soup du jour.
Book of the day.
Version of the day.
the "D'uh" of the day - (Homer Simpson is as famous in France as in the US)
Du jour means "of the day".