What does fallar a alguien mean?
Expression
to let somebody down
Stronger than rajarse: rajarse is cancelling, fallar is having been needed and not being there. It is much used in the negative and as a request — no me falles — and it carries an emotional weight that cancelar does not. Its natural opposite is cumplir, and the answer to no me falles is usually some form of it.
Cuento contigo, no me falles.
