Fat lot of good is a phrase that I grew up with and continue to use occasionally as in the following:
He is working hard to fix the problem, but a fat lot of good it will do him without the proper tools.
Which means that despite his best efforts, he is not likely to fix the problem until he starts using the proper tools.
I've only heard the phrase used with a sarcastic tone as if the phrase is supposed to mean that it will do a lot of good. (Similar in tone to when someone says I could care less when they really mean I could not care less.)
What is the origin of fat lot of good and was it ever in common usage with a positive meaning?
Best Answer
I don't believe fat lot of good was ever in common usage with a positive meaning.
"A fat lot of good"
The earliest reference I can find in Google Books is 1876's Investing Uncle Ben's Legacy: A Tale of Mining and Matrimonial Speculations by Old Boomerang aka John Richard Houlding:
Non-ironic "fat lot"
As FumbleFingers comments, it's worth noting that a fat lot was also used non-ironically quite a bit earlier, for example in 1833: "adds a fat lot of knowledge" (or could this be ironic?). It's notably used when talking of livestock 1834: "The best fat lot of stots was purchased by Mr. Norrie"; 1862: "A fat lot of 100-lb. Sheep"; 1862: "A good fat lot of sheep".
But Bradford Frazee's 1845 An improved grammar of the English language lists these as incorrect constructions of adjectives:
Ironic "fat lot"
However, the use of fat lot (without of good) used ironically in slang also has heritage.
1844's The Downside Magazine and Monthly Miscellany says:
John Camden Hotten's 1865 A dictionary of modern slang, cant, and vulgar words : used at the present day in the streets of London, the Universities of Oxford and Cambridge, the Houses of Parliament, the Dens of St. Giles, and the Palaces of St. James : preceded by a history of cant and vulgar language from the time of Henry VIII, shewing its connection with the Gipsey tongue : with glossaries of two secret languages, spoken by the wandering tribes of London, the costermongers, and the patterers says:
An example from 1866:
And from 1869:
Ironic "much" and back to Shakespeare
The 1875 edition of William Gifford's The works of Ben Jonson; with Notes Critical and Explanatory, and a Biographical Memoir is illuminating.
The Reverend Peter Whalley had edited The Works of Ben Jonson in 1756 with footnotes, which Gifford added to.
On page 110-111 (or 408 in this viewer), Jonson wrote in Every Man In His Humour:
The footnotes add:
How do we link this lot to fat lot? Well, on page 185 we have a third note!