SPUD

Shimano Pedaling Dynamics (SPD). Any pedal on a bicycle that uses a form of clip-in ski binding to hold your foot onto the pedal. SPuD newbies spend a lot of time failing to unclip from their pedals when coming to a halt, and consequently keel over sideways into the ground whilst still attached to their bikes with a puzzled expression on their faces. This is amusing to experienced SPuD users, but not the newbie in question. Example: I bought SPuDs and spent a week falling over sideways. Consequently I have plenty of scabs on my arms and legs.