A janitor at Valve Inc. game studios, often confused with RobinWalker, a beloved programmer of the same place of employment. He was first delivered to fame by the Team Fortress 2 podcast "KritzKast".
"Yo, Kev! Kevlar Keino! Nothin' gets through the wall of Kevlar Kevin Walker!"
"So, Mr. Kevin Walker, can you tell us about the direction TF2's gonna be taking?"
Used by middle/upper class white folk to refer to a group of peopleoutside of their social and economic status. Not necessarily a derogatory phrase, but often leveraged to invoke politeness or intentional ambiguity around the individuals to which they are referring.
Me: "What kind of people typically buy the Cadillac Escalade."
Cadillac Salesperson: "We get customers from all walks of life."
Term widely used by Verizon Wireless employees to denote a person with a poor/derrogatory credit rating. In most cases these potential customers are required to put $1000 or "1K" down as a deposit in order to sign up for service. Evidence of these customers low socio-economic status is easily noticed due to their lack of hygiene, common sense, people skills, and literacy.
"As expeceted, that drunken clown was a Walking1k."
"Gee Steve, I wonder if that man in the soiled sweatpants is going to be a Walking1k."