In 2009, when the health care law was still being written, Sarah Palin coined the phrase "death panel" in a widely shared Facebook post. The headline of her post was innocuous enough, "Statement on the Current Health Care Debate."
Link: https://www.npr.org/2017/01/10/509164679/from-the-start-obama-struggled-with-fallout-from-a-kind-of-fake-news