Originally Posted by DontRunMeOver

Chas'n'Dave are an extremely homely pair of musicians who play cheesy piano based music and 'knees up mother Brown' is just the kind of 'traditional party song' they would sing...

'"Knees up mother Brown
Knees up mother Brown
Under the table you must go
Ee-aye-Ee-aye-ee-aye-oh"

and so on.