A girl (or guy) who's always got one hand holding a dude's cock and the other digging in his pockets. They are completely unable to sustain themselves on their own and are closer to being parasites than human beings.
Person 1: Whatever happened to that hot chick from high school?
Person 2: She realized that she couldn't do anything else useful for society so she just became a cockholder. I see her at the bar with a different dude every night, and he's always buying....
A small piece of information. Derived from the word ken, used often in the scottish language and is synonymous with knowledge.
Person 1: "Hey I don't get this shit. How do you solve this problem?"
Person 2: "I got that one. Give me some kenlets on this assignment and I'll help you w/ that one."