It is something or someone related to the pedal. In several cases it is literal, as in the pedalboard or pedalboard of musical organs, or in physical exercise machines that have pedals with variable resistance to train the legs. In others it is used familiarly to name a cyclist. And finally it is an irony or a mockery, which depending on the case could refer to who makes a financial bicycle or who drinks a lot of alcohol and is always drunk, although in this case the etymology would be in a sense of fart converted to the euphemism "pedal". See pedaling the bicycle, be fart .
