2. A pretty cool band that heard a pretty cool phrase in The Empire Strikes Back and embraced it as their own.
3. Probably a Kevin Smith reference somewhere in the movie universe.
They can best be compared to the American cowboy or shepherds of old in their steadfast pursuit of an independent lifestyle. They generally wear old, worn out work clothes and carry simple projectile weapons as well as staves they use to drive obstinate nerfs out of their hiding places. Due to their significant skills in fieldcraft and gunplay, as well as not having the resources to bathe and change their clothes often, the rest of the "civilized" universe looks down upon them.
2) An insult in the Star Wars trilogy.
3)A 90's band catering to fans of obscure Star Wars trivia.
Leia: You're nothing but a scruffy-looking nerfherder.
Solo: Who you calling scruffy-looking?