A connotation to having sex with two other people... but three pedals actually relates to cars. Brake, Clutch, and Gas Pedal.
Lets have a three pedals night
by Vocab Masta September 27, 2005
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The procedure a person follows to drive a car with manual transmission.

"Three pedals," from left to right: Clutch, Brake, Accelerator.

"Two-step": Ordinarily, a couples' dance step.
"C'mon... I'll teach you how to do the three-pedal two-step."
by Ponyguy March 28, 2010
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