1. (n) Often bearded, hairy, and just plain dirty, someone who walks about looking and acting sketchy, will probably ask you for a ciggarette, a dollar, drugs or want to touch you in some manner.
2.(n) a lurker, someone who will try and talk to you for hours because they have no where better to go.
3. (n) basically, almost everyone at a Grateful Dead, Disco Biscuit or Phish concert. anyone, spinning glowsticks on strings, hoola hooping, or pushing dirty drugs.
4. (adj.) to reep, the act of walking around in a sketchy manner, doing sketchy things.
"Damn, that grizzly looking sicko just rubbed my belly, what a reeper!!"
"Dude this reeper just jabbed my ear off for a half an hour about coco puffs, while i was in line for the bathroom"
"Some reeper with crystals in his dreads just tried selling me some fake rolls!"
"After the show I just reeped it around the lot looking for some girls to take back and party with"