The Oxford English Dictionary has man-flesh (hyphenated so) as a word attested since the seventeenth century.  Tolkien does not hyphenate it and only Tom the troll says it.  More on hyphenated words hereafter.  I merely observe my own little shudder to learn that the trolls have a word for this particular variety of meat.

• 02.045 “Never a blinking bit of manflesh

Update 2015.06.08: I’m adding the tag “high” to this word to be consistent with later use of the tag – indications of danger are adventurous and thereby earn this tag.

“man, n.1 (and int.).” OED Online. Oxford University Press, March 2015. Web. 9 May 2015.