“Go eat cake” is almost certainly a mistaken version of “let them eat cake,” the phrase often linked to Marie Antoinette. It means someone is so out of touch with ordinary people’s struggles that they suggest an absurdly privileged solution to a basic problem.

What it means

The saying is usually used to criticize indifference, privilege, or cluelessness. In context, the point is that if people do not have bread, telling them to eat cake sounds cruel and unrealistic.

Marie Antoinette connection

The quote is widely attributed to Marie Antoinette, but historians say there is no solid evidence she actually said it. The original French phrase is usually given as “Qu’ils mangent de la brioche,” which refers to brioche, a rich bread, not the dessert cake people imagine today.

Simple example

If a wealthy person says, “Can’t afford rent? Just buy a house,” that has the same vibe as “let them eat cake.” It is a shorthand for being detached from reality.

TL;DR

“Go eat cake” likely means “you’re being dismissive and out of touch,” and the Marie Antoinette quote is probably a myth used to symbolize royal privilege.