Adjective: janky jan-keeUsage: US, informal- Of poor quality, unreliable, or unappealing
"The old car was pretty janky, but it got us where we needed to go"
Noun: janky jan-keeUsage: US, informal- Something of poor quality or in bad condition
"That janky needs to be replaced before it falls apart"
See also: cheapjack [N. Amer, informal], gimcrack, shoddy