A man displayed or photographed for having an attractive, muscular physique, or one who has these qualities in general. I always buy the fire station's charity calendar because I love looking at the beefcakes in their firefighter outfits.
beefcake
1. n. a display of the male physique. (see also cheesecake.) There was one calendar showing beefcake rather than the usual cheesecake.
2. n. a muscularly handsome male. She’s been going out with a real beefcake.