To be very scared or frightened. The phrase literally translates to 'more scared than a fish on Holy Week', referring to the tradition of eating fish instead of meat during this time period in many Spanish-speaking cultures.
Examples
- Spanish: Cuando vio la cantidad de trabajo que tenía que hacer, estaba más asustado que pez para semana santa.
- English: When he saw the amount of work he had to do, he was more scared than a fish on Holy Week.