džaba ste krečili

1. colloq. it was all for nothing; you wasted your effort
   Ako on ne dođe na sastanak, džaba ste krečili. — If he doesn't show up to the meeting, it was all for nothing.
   Utakmica je otkazana, džaba smo krečili. — The match was cancelled, so all our effort was wasted.

Often said mockingly when someone's plan has failed.