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"
by multi-wall July 1, 2008
1. Stop playing with your self in my classroom, Billy!

2. "O Lord, do we have the strength to carry out this mighty task in one night? Or are we just playing with myself?" -Blazing Saddles
by Jerry September 07, 2004
by James121222 February 23, 2017
Boy 1: So, what were you doing this weekend?
Boy 2: I was, uh, playing with not myself...
by thatstragic October 9, 2022