When something is jerry-rigged, it means that it's been improvised or put together haphazardly. If we want to find synonyms for more jerry-rigged, we might look for words that suggest a similar sense of "made up on the spot." Some possible options include makeshift, slapdash, impromptu, jury-rigged, cobbled together, or rough-and-ready. These words all convey a similar sense of something being constructed quickly and without much planning or forethought. Of course, the best word to use depends on the context and the tone you're trying to convey - but any of these synonyms could do the trick!