indeed this may be a strange hippo like cartoon (originating from germany), but a moomin is much much more. if thou happen to know a boy who is podgy, with a pronounced, snout like face, he may be refered to as a moomin. other names for this kind include 'Peru'
hahaha, did you just see moomin fall over?
moomin just swang for square 'ed!
moomin you absolute gee!