Screw things up for yourself. Let yourself down. Betray yourself by acting in a way that's opposite to your own interests or (conscious) intentions.
The Amy Winehouse song "Tears dry on their owm":
"Yeah, I played myself again, should just be my own best friend, not fuck myself in the head with stupid men"
Said when someone remembers the game
, loses, and wants to take down any nearby players with them.
Linda: Can you actively try not to think about polar bears?
Linda: Like, actively try not to think of them?
Rupert: Oh damn, I just lost
Linda: Wha? Oh, arse, now I have too!