A term referring to the rotating governors used on steam locomotives and related steam engines such as tractors. The brass balls acted as weights on the end of linkages, and rotated with the increase in RPM of the engine. As speeds rose, the balls swung outwards, rising on the linkages. At a pre-set height, the release valve would engage, lowering steam pressure and reining in the RPM to the allowable maximum. The balls rose towards the firewall and/or the walls of the cab., hence the term.
by Larry Grosfield May 29, 2008
When you take a risk, or doing something that you normally would be not inclined to do; doing something dangerous some may see as foolish or 'crazy'; just doing 'it'
When crossing a busy street to meet his friends, Ian saw a truck coming at him at a high velocity, instead of stopping and waiting for the truck to pass by, Ian decided to go balls to the walls and cross the street anyway, impressing the friends he was trying to catch up with.
by Omega_Pirate December 26, 2006
It's all or nothing. There is not turning back. Reach down, dig for the biggest pair you can find, and go!
Okay Ted, there are close to 15 guys behind those hedges, and two of us. Balls to the wall time. Lets go.
by Regainer May 16, 2011
by Kyle Rainey February 02, 2006
Not with the gay connotation, "balls to the wall" denotes really exerting yourself to the point of extreme involvement.
by the rilz February 22, 2010
When you are having sexual intercourse and your fully penetrating the Vagina and your balls are hitting "the wall" or the woman's ass.
by The Aloha Snake January 16, 2014