Someone who enjoys having sex with their meaty food products and/or dead animals. It is a mixture of beastiality as well as necrophilia.
Brandon: "Hey, so last night I wondered what it would be like to fuck my burger, so I tried and MAN! it was awesome!"
Kyle: "Dude u had sex with a dead animal?!?! Wtf...ur a beastinecrophiliac! That's soooooo messed up!"