A Strawman Argument, or simply strawman, is an argument that misrepresents a position of the other side, in order to make it appear weaker than it actually is. The arguer then refutes the arguer's misrepresentation of the position, leading others to conclude that the real position has been refuted.
It is an intentional misrepresentation of an opponent's position, often used in debates with unsophisticated audiences to make it appear that the opponent's arguments are more easily defeated than they are. This is a fallacy, of course, because it has done nothing to actually refute the position of the other side of the argument, nor provide any evidentiary support of either side of the argument.
The pro-vaccination doctors do not care about our autistic children, so vaccines are bad.