"On the cheap" is an idiom that means to do something inexpensively or at a low cost. There are several synonyms for this phrase, including economically, frugally, thriftily, inexpensively, affordably, on a budget, reasonably, and cost-effectively. These words all convey the idea of being mindful of expenses and trying to save money while still achieving the desired result. They can be used interchangeably with "on the cheap" in many contexts, such as travel, shopping, or home improvement. Regardless of the phrasing, the goal is the same: to find ways to cut costs without sacrificing quality or value.