Her granddaughter posted the letter on Twitter and it's since gone viral.
If you've been thinking about leaving a lousy job for a while, this might just be the inspiration you need.
Kaitlyn McGrory from Glasgow posted a resignation letter which she says her gran wrote to Twitter, and it's about as brutal as it could be.
Clearly a disgruntled employee, Marlene starts by saying, "The joab's crap and am leaving (sic)" before wishing her boss, Mr MacGillivray, luck "in getting some other mug to clean the place."
We're not sure where Marlene worked but sounds like she's delighted to be throwing the towel in!