As a proper noun crocker
is .
As a noun clocker is
a person who clocks (illegally winds back the milometer of) a motor car.
crocker
English
See also
*croker
References
*Krueger, Dennis (December 1982). "Why On Earth Do They Call It Throwing?" Studio Potter Vol. 11, Number 1.[http://www.studiopotter.org/articles/?art=art0001] (etymology)
clocker
English
Noun
(
en noun)
A person who clocks (illegally winds back the milometer of) a motor car
(slang) A low-level drug dealer who operates on the streets.