Definitions by Bearshark

regoose 

To turn on and Fight something you were previously running from.

Some soldiers are in retreat from enemy forces who are pursuing them. Reinforcements arrive and call for a regoose, and the retreating soldiers turn to fight.

Used more commonly in online games, such as Dota 2, League of Legends, etc.

regoose by Bearshark January 9, 2014