keep a pig
Preserved but no longer current.
An Oxford University phrase, which means to have a lodger. A man whose rooms contain two bedchambers has sometimes, when his college is full, to allow the use of one of them to a Freshman, who is called under these circumstances a PIG. The original occupier is then said to KEEP A PIG.
Era: ca. 1874 (Victorian)
Sources & notes
Historical definition reproduced from Hotten’s The Slang Dictionary (1874, public domain; Project Gutenberg #42108, retrieved 2026-07-31). Reflects the attitudes of its era.
Common questions
What does “keep a pig” mean?
An Oxford University phrase, which means to have a lodger. A man whose rooms contain two bedchambers has sometimes, when his college is full, to allow the use of one of them to a Freshman, who is called under these circumstances a PIG. The original occupier is then said to KEEP A PIG.
Is “keep a pig” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.