Manifest: A paper cluesheet with addresses or directions to the race’s mandatory checkpoints. Racers obtain stamps (at manned checkpoints) or write in clues at unmanned fill-in-the-blank) stops. (Example: "Name the politician referenced on the statue at 34th St. & Vine”.)
Stamp: Inked stamp or signed initials on a race manifest from an event volunteer. Obtained at checkpoints to prove you were there.
Spoke Card: Your race number. Often a laminated index-size card with race logo and "bib" number for event. Placed in wheels spokes before race.
Checkpoint/Stop: Often a city landmark, sign, plaque, or (in the case of manned races) a person sitting inside a restaurant or bar with a stamp or pen. Most alleycats have 10-plus checkpoint stops that racers are required to find before riding to the finish.
Skitching: Grabbing a moving vehicle while riding for a tow. Common with some experienced couriers, but illegal and not recommended.