For other english speakers:
Reunión de pastores, oveja muerta (gathering of shepherds/sheepmen, dead sheep )
origin: When the shepherds gather to speak, usually they kill a sheep to cook him after speaking
meaning:it means when important people is gathered (for example in a meeting) usually low-level people (workers) will suffer in the future
other meaning: If you're near/in a gathering of important people at the end you will have to make a task you don't want because of your level, try to avoid them.
Hope it helps to find a proper saying.
saludos