Keystone Kop

[kop]
noun
  1. Usually Keystone Kops. (in early silent movies) a team of comic policemen noted for their slapstick routines.
  2. Also Keystone Cop. a person noted for bungling inefficiency: a backfield of Keystone Kops.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018