A quickie can have different meanings depending on the context. Here are some definitions from various sources:

• A quickie is a brief act of sexual intercourse that usually does not involve much foreplay).
• It may also refer to other sexual activities that are done quickly, such as oral sex or mutual masturbation).
• Some people consider quickies a solution to unequal sexual desire in a relationship, but if they become the only form of sex, the relationship may suffer).
• In a broader sense, a quickie can refer to anything done or made quickly.
• It can also refer to a quickly produced work, such as a motion picture or book.
• In some cases, it may refer to a quickly consumed alcoholic drink.

Overall, the term "quickie" usually implies something that is done quickly and without much preparation or effort.