This term comes from the the movies, obviously. It means that something is
Sketchy, or you are unsure of something. In case you never noticed in the movies, everything
Indiana Jones climbs on, or any bridges he crosses, always look unstable as if they will collapse at any given
time.
"Dude, the stairway leading to your place is SO
Indiana Jones..!"
"Oh my god! when you leaped over that Indiana Jones sewer, that was
fucking Megatron."