BADS

bads, n. Slang. In economics, the counterpart of “goods,” characterized by a negative correlation between the amount consumed and the consumer’s wealth; specif., the kinds of products that tend to be bought only by poor people. “Some products are termed ‘bads’ because consumption of the product tends to decrease with increasing wealth. Spam is one example of a bad, while beef tenderloin is generally thought to be a good.” Donald S. Chisum et al., Principles of Patent Law 54 (1998).
[Blacks Law 8th]