Is there a pejorative alternative to "improvise"?

I'm looking for a word or phrase that implies improvisation in a negative context. "Jury rigging" comes to mind, but I'm in need of a term that can't be mistaken as anything but pejorative.

The context would be someone remarking at improvisation in annoyance or contempt.


Solution 1:

Both "contrive" and "slapdash" are given by Thesaurus.com as related words with negative connotations. Also, "to hatch" and "to throw together". I would also add "to hack", though the meaning of the word has changed in the digital context.

Solution 2:

I'll add:

Kludge

Makeshift

Willy nilly