In the game of Beerpong when a team is "blacked out", loses a game without making a single one of the opponent's cups. The losing team must sit under the beer pong table for the subsequent games until they grab a ball that goes off the table. Like a mythical troll sits under a bridge.
"Hey have you seen Emma and Tyler?"
"Yeah, they're under the table bro"
"WOW, if they got blacked out they deserve to play Troll!! haha"