Stop yer ivverin' an' ovverin' an' get on wi'it. (Stop messing about and get on with the job.)
Black Country Sayings via Plep
I also like Making a noise like a gleed under a door. (Someone singing badly.)
I may have sounded like such a gleed indeed singing my way through all those pianola midis.
Some ribald riddles from the Exeter Book
(one link of many at Apothecary's Drawer)