It means someone has used all their chances for a do-over or exhausted their backup options. The phrase comes from golf and card games, where a “mulligan” is a free retry, so “used up all your mulligans” means you’ve run out of retries or second chances.

In plain English

People usually use it figuratively, not literally. It can mean:

  • You’ve already made too many mistakes.
  • You’ve spent all your goodwill or leniency.
  • You don’t get another reset this time.

Example

  • “He kept missing deadlines, and after a while, he’d used up all his mulligans.”
    This means people stopped giving him extra chances.

Tone and nuance

The phrase can sound playful in casual conversation, but it can also sound firm or disappointed depending on context. In some cases it implies that someone’s margin for error is gone.

TL;DR

“Used up all your mulligans” = you’ve used all your do-overs and won’t get another one.