1. eating greedily or excessively; consuming food in large quantities without restraint
Usage: informal; often used with 'out'
2. living or behaving in a dirty, messy, or slovenly manner
Usage: informal; often used with 'out'

1. the act or practice of eating greedily or living messily
Usage: informal
2. a pipeline cleaning device that travels through a pipe to remove deposits
Usage: technical; petroleum industry

Examples

• We were pigging out on pizza and ice cream all night.
• After the party, the living room looked like they'd been pigging out for days.
• He's been pigging on junk food since he got home from school.
• The pigging operation cleaned the pipeline of accumulated residue.
• They spent the weekend pigging out and watching movies.
• The maintenance crew used pigging to maintain the oil pipeline.
• Stop pigging out and save some dessert for everyone else.