In videogames, especially Escape from Tarkov, a person who almost exclusively uses the AS VAL. They are usually clad in the highest quality Slick plate carrier and an Exfil helmet if you encounter one in Tarkov, however it is not exclusive to there, as anyone that is good with the as val (Or its DMR counterpart, the VSS) is, by definition, a val gamer.
"Aw, he got me with a f*cking VAL, man. Stupid val gamers." -Daniel