Originally referred to the governor on old steam engines that had two ball that rotated across one another that would control speed depending on how fast they spun. Balls out meant going full speed or power.
That old steam tractor was going balls out.
by tradesman November 21, 2003
Get the balls out mug.
giving your all in a certain situation, being courageous
You should've seen me out there, I started to choke but then I went totally balls out.
by skrilla June 17, 2003
Get the balls out mug.
Old timey terminology: on steam engines, they had steel balls in there that resricted steam flow. When the conductor was ready to pick up speed, he'd yell "Balls out!", signaling the help to do just that, thereby letting them haul some ass.
"Balls out! We got to mow down those hobos!"
by Dutch Grosse September 29, 2003
Get the balls out mug.
When things get really tough or crazy, and one has to try harder to accomplish a goal.
Holy shit, the football team scored a point under a minute on the 4th quarter! The other team has no other choice but to go balls out, dude!
by Alphadestrious January 3, 2004
Get the balls out mug.
Balls Out means many things. 1. Literal balls out of pants 2. No fear 3. Goin for it 100%
it's what we are. Steel Panther is Balls Out.

- Stix
by better than tessa September 5, 2011
Get the Balls Out mug.