One who conforms to the prevailing ways and opinions of one's time or condition for personal advantage; an opportunist.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "timeserver" in a sentence
"I suspect your label “Vichy policeman” is code for “timeserver”."
"It would be unfair to say that Göran Kummel is a conscious timeserver."
"Everyone knows Powell for what he is: a pothunting timeserver."