1. an enclosure where pigs are kept
2. a very messy or dirty place
Usage: informal

Examples

• The farmer built a new pigpen behind the barn.
• The pigs rolled in the mud inside their pigpen.
• We need to clean out the pigpen before winter.
• His bedroom looks like a pigpen with clothes everywhere.
• The kitchen was a complete pigpen after the party.
• She refused to work in that pigpen of an office.