Top definition
1. To become an officer after serving as enlisted. Origin: military.

2. Go renegade and betray friends and allies
1. Corporal Hanson is sure to go mustang if he stays in. He's smart and has his shit wired high and tight.

2. In 1990 Iraq went mustang and screwed over all of her allies when they invaded Kuwait. Origin: uncommon slang.
by james savik September 18, 2015
Get the mug
Get a go mustang mug for your friend Trump.