moba

1. (in a village) communal work; work bee
   Komšije su došle na mobu da pomognu oko kukuruza. — The neighbours came to help with the corn harvest.
   Nekada se kuća u selu gradila mobom. — In the past, a village house was built through communal work.

Usually used in phrases like "ići na mobu" (go to help) and "zvati u mobu" (call for help).