In economics, a bliss point is a quantity of consumption such that further increases would make the consumer less satisfied. Thus, it is a quantity of consumption which maximizes utility

Utility

In economics, utility is a measure of customer satisfaction, referring to the total satisfaction received by a consumer from consuming a good or service....

 in the absence of any budget constraint

Budget constraint

A budget constraint represents the combinations of goods and services that a consumer can purchase given current prices with his or her income. Consumer theory uses the concepts of a budget constraint and a preference map to analyze consumer choices...

. In other words, it refers to the amount of consumption that would be chosen by a person so rich that money imposed no constraint on his or her decisions.