Indecent is a vague term referring to any type of behavior disapproved of within a particular society. Note that a certain behavior may be "indecent" in one society, but perfectly acceptable in another.
Definition from http://dictionary.reference.com/browse/indecent :
- 1. offending against generally accepted standards of propriety or good taste; improper; vulgar: indecent jokes; indecent language; indecent behavior.
- 2. not decent; unbecoming or unseemly: indecent haste.
Indecency is defined by a particular culture's morality: From Wikipedia:
- Morality (from the Latin moralitas "manner, character, proper behavior") is the differentiation of intentions, decisions, and actions between those that are good or right and those that are bad or wrong. Morality can be a body of standards or principles derived from a code of conduct from a particular philosophy, religion, or culture, or it can derive from a standard that a person believes should be universal. Morality may also be specifically synonymous with "goodness" or "rightness."
Continue reading the above article at: https://en.wikipedia.org/wiki/Morality