Now it's fill up your needles and make 'em a double
It's CARDENDS we're stitchin' and they're naught but trouble
Fill up your needles, it's six pence a bowl
And Elsie's a-callin', she's fastest of all

Instead of CARDENDS it will be COD ENDS.
The cod end is the the smaller end of the trawl where the fish are finally trapped.