A rod in pickle old-fashioned noun phrase
A punishment or penalty that is prepared for future application
The teacher said he had a rod in pickle for those who didn't do the homework.
To punish someone or something harshly
To escape from the statement saying that someone is guilty of a crime or of doing something wrong or evade impeachment without being responsible for any sentence or punishment
Someone is going to receive a harsh punishment for what he or she has done something wrong.
Small-time criminals will face the full consequences of the law while those who commit large-scale crimes will go unpunished.