apparently used to describe some thing that was extremely humourous, and/or a humourous person.
Although a nar dans sense of humour is some what, undeveloped, this term is used as a signal to all other lower ranked bledrin to laugh hystericaly.
"nar that was bear joke!"
" he is joke!bear..,"
(this is blived to simply be a problem encountered in the part of the brain dealing with speach, apparently this particular subjects grammar had rotted to a point that he found it hard to speak at all)