Any variety of small, Celtic faeries who exchange their usual green suit and tophat for a black catsuit. This fairy uses their innate advantage of size and agility to supplement their abilities as a thief and assassin; training in the ways of ninjitsu and practicing constant masturbation.

(noun) A successful type of theft which results in an acceptable, impressive and rewarding payday for the protagonist.

Also: Tom Cruise in 'The Last Samurai'

Any variation of smaller than human size beings that are leprechauns who also have training in the ways of the ninja. Said LNs can take spirit or material form. They can be seen wearing a mix of leprechaun and ninja clothing items.

A piss retarded flamer who can't get enough karma by sucking up to every known mod in existence.

A retarded flamer who incessantly haunts forums, an LN has no life, no "real" friends, and never, NEVER gets any pussy. For reasons unknown an LN is regarded as popular, this is most likely caused by an LN fucking one of the staff members for forum favors, male staff members of course.