up the duff
Proposed by a contributor, not yet supported by evidence.
Meaning · English
Pregnant.
Register: colloquial, slang
Examples
Lynda up the duff—what odds do you put on that, eh, Mr Clever Dick, eh? That's shut his gob. That's put a crease in his brand-new suit.
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “up the duff” mean?
Pregnant.
Is “up the duff” formal or informal?
up the duff is generally colloquial, slang.