up the duff

== English == === Etymology === (This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.) Unknown; the OED states that the phrase was originally Australian. Possibly related to in the pudding club (duff is a type of pudding) and thus related to dough. === Pronunciation === === Prepositional phrase === up the duff (UK, Ireland, Commonwealth, colloquial, slang) Pregnant. Synonyms: see Thesaurus:pregnant ==== Usage notes ==== Possibly offensive to pregnant women. Usage may imply that the pregnancy is unplanned or unwanted.