1 definition by Dutch Grosse

Top Definition
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

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