Rack Up Meaning
(idiomatic) to defeat severely, to thrash
Example: At the start of the game, the referee racks up the red balls.
Chelsea racked up another 3 points at home to Bolton.
2013, Daniel Taylor, Jack Wilshere scores twice to ease Arsenal to victory over Marseille (in The Guardian, 26 November 2013)
In between, Mesut Ã–zil's penalty was saved and Arsenal racked up more chances than they would probably want to remember.
rack up some opinions about the new shopping center.