As Crushable put it, the title is "a phrase she really should have Googled." Malone's most recent film work of note includes Sucker Punch, the TV miniseries Hatfields & McCoys, and a recurring role in the Hunger Games movies.
ICTMN's own Vincent Schilling wrote (in "What or Who Is an Indian Giver? A History of the Offensive Term") that the phrase dates back at least a century and a half, and is tied to the idea that the Indians encountered by Lewis and Clark and other exploers/invaders were unfair barterers. Really? We recall someone getting an unbeatable deal--you might call it a steal--on the island of Mannahatta and more than a few broken treaties and forced relocations. It's hard to think of a less accurate generalization, really.
In using the blatantly racist term without hesitation, Malone joins the ranks of Matt Lauer, Kris Jenner, Rush Limbaugh, and the 1910 Fruitgum Company.