Someone that is such a dope fiend they ask to scrape your pipe and lick you empty dope baggies they pick their face when nothing is there and leave puss juices all over your mirror.
A person with the ability to hit another with their scrotum without the other's notice. Usually done by people who have had little to no sexual intercourse in at least four years.
Man did you see that? When the woman wasn't looking, Roberto opened his pants and gently struck her leg with his testicles. What a Knack Sacker.