After Brigadier General Thomas R. R. Cobb's Irish Regiment of Georgia pushed back Lieutenant Colonel St. Clair Mullholands Irish Brigade, a Captain (3 stripes on the collar) took off his hat and started yelling "Haroo! Haroo!" and the rest of the regiment cheered "Haroo!"
by Jedi_Master June 15, 2008
Used by the gaming community known as the Acolytes. It is used to express something positive that has happened to the community or someone in it.
by Hiezu January 28, 2010
by Theo Rosenthal January 23, 2007
by Daniel "El Hefe" Posner September 03, 2003