The term "x-outing" doesn't have a widely recognized or established definition, therefore antonyms for this word would be difficult to pinpoint. However, if we consider "outing" in general as a noun that refers to an excursion, trip or adventure, antonyms could include terms such as staying in, remaining home or being stationary. Other possible antonyms for "outing" could be terms that suggest opposite experiences, such as confinement, imprisonment or isolation. It's important to note that antonyms are words with the opposite meaning of another word, therefore, without a clear definition of "x-outing", it's difficult to provide precise antonyms.