As a verb decoked
is past tense of decoke.
As a noun decokes is
plural of decoke.
decoked
English
Verb
(head)
(decoke)
decoke
English
Noun
(
en noun)
(informal) decarbonization.
Verb
(decok)
(informal) To decarbonize, especially to remove the build-up of carbon in the cylinder of an engine or the bowl or a pipe
References
*OED 2nd edition 1989