jerrybuild
To assemble a project in a hasty, sloppy manner, especially using cheap, inferior or improvised materials.
transitive
It was a queer-looking hovel, built of galvanised iron and kerosene-cans and bark and saplings and bamboo, according to no definite plan, and obviously, to knowing eyes, by one of those masters of the craft of jerry-building […]
To assemble a structure in such an unsafe manner that it is doomed to collapse.
To repair a structure in a sloppy or unsafe manner.
Where it comes from
Blend of jerry + build; unknown origin; see jerry (possibly etymologically related).
Adapted from the Wiktionary entry jerrybuild (CC BY-SA 4.0).