One who smokes your weed and then proceeds to rant on and on about how it was a bad idea to smoke (i.e getting caught or pulled over) instead of enjoying your weed. Also will blame others for him/herself getting caught and make you buy eyedrops and/or spray.
Ted: Man those were dank headies we got
Bill: No this isnt cool you have to go in walgreens and grab eyedrops im to afraid to see someone i know.
Ted: Dude your being a stoner buzzkill