Gamer Goo is the gunk/residue that accumulates on video game controllers, playing cards, table tops, etc. Generally more common with gamer-guys than gamer-girls.

Think of it like a combination of sweat, sticky, cheeto residue, and unwashed hands.
Use a paperclip to scrape the seem of a video game controller, the revealed gunk is "Gamer Goo". Go into your local game store and touch one of the tables, that sticky/gross tactile sensation is "Gamer Goo". See that dark spot on your playing cards? GAMER GOO.
by Kalkin October 19, 2013
Get the Gamer Goo mug.