The phrase "mad bomber" refers to a person who is crazy or mentally unstable and intentionally sets or plans to set off bombs to cause harm or chaos. Full definition
Kepesh is introspective, but frank; his voice over is frequently very funny, and the fact that the film stars Dennis «Mad Bomber from Speed» Hopper as a Pulitzer Prize winning poet -LRB-!) (filmireland.net)
But sometimes you just can't stop yourself from bingeing a nicely paced true - crime dramatization with unlikely actors in the crucial roles, like we have here with Avatar's Sam Worthington (as a dogged FBI agent who uses linguistics to track down the Unabomber), Avengers: Age of Ultron's Paul Bettany (as the hermetic, manifesto - writing mad bomber), and Party Down's Jane Lynch (as Janet Reno!). (thrillist.com)
They're not just some crazy mad bombers, they're people doing what they thought was the only thing they could do to save their planet from dying. (tinygirltinygames.com)