The story
From Marie Antoinette (1755–1793), French queen, traditionally said to have had a frivolous regard for the starving peasants; see Let them eat cake.
Etymology from Wiktionary, CC BY-SA 4.0.
Marie Antoinette
Today it means: Someone with an extravagant and luxurious lifestyle, often at the expense of those who lack food, clothes, or shelter. Full definition →