what's the meaning of"yes-no man "

指没有自己观点的人。见下面例句：

He will have to be just a "yes" man or "yes no man". He is a backboneless politician who has not done any good thing to the country.

就是说只会说“yes和no”的人。指不发表自己意见的，随声附和别人话题的人

yesman n.唯唯诺诺者, 好好先生

由此推论yes-no man为“墙头草两边倒”的人