Me apendejé y olvidé estudiar para el examen.
I messed up and forgot to study for the exam.
Se apendejó en la jugada y le quitaron el balón.
He screwed up during the play and lost the ball.
A veces se apendeja gacho.
Sometimes his brain just shuts off.
— ¿Por qué hiciste eso?
— No sé… me apendejé gacho.
— Why did you do that?
— I don't know… I had a brain fart.