Noun - rayfk (pronounced like A.F.K. - as in "away from keyboard") refers to a state of constantly disappearing and reappearing when playing a series of online video games, including, but not limited to: StarCraft II, Heroes of NewErth, World of Warcraft, and WC3 Dota. This state occurs frequently, is usually unannounced, and can range from seconds to hours in duration.
This maneuver was made popular by one of the gaming world's up and coming star athletes, Zekeal (ray).
Example 1: "Everything okay? I'm farming well. Wait wtf... WOW 3 people here. NICE CALL MID. HELP...?! Getting ganked... dead. Tower going down, DENY, DENY! Tower down. RAY? rayfk...."
(from fountain)"Oh hey sorry"
Example 2: "Going early speeds to roaches, lets hit at 6. Oh shit 6 pool. DOUBLE 6 pool... help. Send lings, marines... DRONES, ANYTHING - help. I'm dead. RAY? Ugh... rayfk."
(from the abyss)"Noobs... DIGGY NO! BAD! Noobs"