contraption - a machine or device that appears strange or unnecessarily complicated, and often badly made or unsafe.

contraption

kənˈtrapʃ(ə)n/

noun

1. a machine or device that appears strange or unnecessarily complicated, and often badly made or unsafe.

   "repairing stereos and making contraptions out of spare electronic bits"

   synonyms:

   device, gadget, apparatus, machine, appliance, mechanism, implement, utensil, invention, contrivance; More