Exotic Option

What Does Exotic Option Mean?
An option that differs from common American or European options in terms of the underlying asset or the calculation of how or when the investor receives a certain payoff. These options are more complex than options that trade on an exchange, and generally trade over the counter.

Investopedia explains Exotic Option
For example, one type of exotic option is known as a chooser option. This instrument allows an investor to choose whether the options is a put or call at a certain point during the option's life. Because this type of option can change over the holding period, it is not be found on a regular exchange, which is why it is classified as an exotic option.

Other types of exotic options include: barrier options, Asian options, digital options and compound options, among others.