Slang derogatory term for MTG "Type 2" (Standard) tournament format. This tournament style is looked down upon because it requires players to continuously buy new cards, since after a few months cards become banned.
"Naah, I can't play my deck there, they only do scumbag."
or
"I have 2 decks, one for playing with friends, and one that I keep tweaking so I can play scumbag format."