How can I be "beside myself" with whatever?

My mother recounted a story from when she was in the WRAF of doing cleaning and her boss telling her to 'use some elbow grease'.

She looked in the cupboard but couldn't find any so reported this back to her boss.

And now it's a real brand of cleaners 

And excellent too - especially the cheap, 'Elbow Grease' wipes sold in Home Bargains.

And excellent too - especially the cheap, 'Elbow Grease' wipes sold in Home Bargains.