Noun

1. An unpenalized chance to re-take a stroke that went awry.

   If you lose your drive in the water, take a mulligan and try again.

2. A second chance.

   Don't do poorly in your first interview; you won't get a mulligan.

3. A unit of measure equal to 62.5 milliliters, or 2.5 shots, of alcohol. So named because it is the cost of being allowed a do-over in drinking games.

   Tom couldn't handle the shot of tequila, so he had to do a mulligan of port.