I'm not sure about the little bit at the top of it
but i think the hole-bit is called a vujaina.
( drbroon a poor wee monkey stole his face, Thu 28 Feb 2008, 12:26, archived)

front bum

( Cockweasle http://b3nn3tt.mybrute.com, Thu 28 Feb 2008, 12:34, archived)