“Janky” is a favorite word of Rbca, my Flaming Lotus Girl friend.
Wiktionary gives its meaning as “1. (slang) of poor quality; untrustworthy”
Let’s say you have to lift a 1 ton sculpture onto the roof of a shipping container but your forklift can’t lift it quite high enough (and it doesn’t have brakes but that’s another matter entirely). It would be a janky setup if you lifted the piece onto a card table with the forklift and then lifted the card table up into the air.
I present the photo that belongs next to the definition, lifted straight out of the most recent Harbor Freight catalog.