Meaning to ignore a fight in the area, to instead push a turret or attempt to backdoor an inhibitor or nexus.
Generally describes a bad mannered style of play.
"Yeah, Fiora totally tried to Saum the tower, no help at all"
"Wow he did awful all game and got carried by his teammates, but he was still really bad mannered and talked trash in the end"
"Yea what a Saum"