Tinker up is an informal verb that means to repair something quickly and often unskillfully. This phrase is often associated with fixing household items or machinery on a temporary basis. However, there are several synonyms that can be used to express the same meaning. Some of the synonyms for tinker up include fiddle with, patch up, rig, makeshift, cobble, and bodged. Each of these words has a slightly different connotation, but they all imply that the repair has been done hastily and perhaps without the proper tools or expertise. Using synonyms for tinker up is a great way to make your writing more varied and interesting.