The phrase "mad titan" refers to a powerful and mentally unstable character, most commonly associated with the Marvel Comics character Thanos. Full definition
Picking up immediately after the events of Thor Ragnarok, Infinity War finally sees the long - teased Mad Titan Thanos (Josh Brolin) enter the galactic stage. (alcohollywood.com)
Fans of mad titans throwing moons at stuff will be very pleased indeed. (flickeringmyth.com)
But the purple Mad Titan doesn't get enough genuine character development for us to ever really care. (inverse.com)