A yesman
A yesman is someone who lets every stupid idea pass because they’re too afraid to say no. They’re like a broken toilet, you just keep flushing and hoping it stops leaking.
'Should we all go to the conference?' 'Yes, yes, yes.'
He said yes to the new project even though he didn’t know what it was.
When asked if he wanted to be fired, he said yes. Then he got fired.