man-of-war(redirected from a man-o-war)
1. A warship. My grandfather was part of the crew on a man-of-war during World War II.
2. A nickname for the Portuguese man-of-war, a jellyfish-like sea creature with a deadly sting. I don't want you kids to go swimming today—there's been reports of a man-of-war in the water.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.