Air: space between the tires and the ground. (Both tires must be off the ground or it isn’t “air”.) Said to be caught or gotten. See sky.
Ano: frequently-misspelled abbreviation for “anodized”.
ATB: All-Terrain Bike or Biking. A synonym for MTB.
auger: to involuntarily take samples of the local geology, usually with one’s face, during [...]