fixie

noun2

1. •
   (informal) A fixed-gear bicycle.

   • A number of couriers in NYC use `fixies' -- fixed-gear bikes with no brakes. — 1992
2. •
   (informal) A fixed-blade knife.

   • Among the other fixed blades en route is the Aegis FX. As the name indicates this is a fixie version of SOG's renovated Aegis folder, which debuted at the beginning of 2020. — 2021