In Connie Willis' Doomsday Book, American archaeologist Lupe Montoya is described as wearing a "terrorist jacket" in several places:
Kivrin’s tutor Latimer, looking older and even more infirm than usual, was standing next to one of the trunks. Montoya was standing over by the console wearing jeans and a terrorist jacket and looking impatiently at the digital on her wrist. Badri was sitting in front of the console, typing something in and frowning at the display screens.
“Well, great,” she said, jamming her papers angrily into the pockets of her terrorist jacket. “The whole village will have washed away while I’m stuck here.” She stomped out.
Montoya was covered in mud, too. She was wearing her terrorist jacket and thigh-high fisherman’s waders like Basingame, wherever he was, might be wearing, and they were wet and filthy.
I've tried looking up "terrorist jacket", but I'm only seeing things branded "terror" and a few references to vests that suicide bombers wear. Is this an actual item of clothing, or is it some sort of future piece of fashion that we're supposed to imagine? As you can see, there's not much context to go on in figuring out what it might look like.