bit part

From bit +‎ part.

bit part (plural bit parts)

1. (acting) A minor role, generally not assigned a name.
   • 2005, Most of her work, however, consisted of bit parts. She often was cast in movies credited only as "flower vendor," "warden" or "suntan lady," — 'Five Easy Pieces' waitress dead at 85, CNN online.

• bit player