This term is used in some Latin American countries, especially in Argentina, and it refers to doing things in an improvised or disorganized way. It's a somewhat derogatory way of saying that something is done without planning or foresight.
Examples
- Spanish: No podemos seguir organizando las reuniones a la paraguaya, necesitamos un plan.
- English: We can't continue organizing meetings in a 'a la paraguaya' way, we need a plan.