duff

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Related to duffed: defuel, quilled, up the duff, flued

up the duff

Pregnant. Primarily heard in UK, Ireland. You two have only been married for a couple of months, I can't believe you're up the duff already! I was pretty wild during my university years, which is how I found myself up the duff at 22.
See also: duff, up

be up the duff

  (British & Australian informal)
to be pregnant Oh, don't tell me Kylie's up the duff again!
See also: duff, up

duff

(dəf)
n. the buttocks. Don’t you get tired of sitting around on your duff?