his dick
-see last post on other story-
http://www.toque.co.uk/blog/archives..._folk_tale.php
Also to top it off, its not the only, confirmed instance of a shit knife being fashioned.
http://72.14.209.104/search?q=cache:...lnk&cd=4&gl=us
specifically "According to legend, Freuchen escaped entrapment in a frozen tent on Baffin Island by fashioning what one might indelicately call a “shit knife.” Club archivist and Curator of Research Collections Clare Flemming confirms that Freuchen did, in fact, fashion a knife out of his own feces, then, once it froze, used it to escape from what would have otherwise been an icy tomb."