Billy opened the rusty old safe to find another, slightly newer one inside of it. "Wow, I never thought the day would come when I would experience safeception," Billy breathed in the damp basement.
A vacation from a friend, activity, or location (e.g. bar, restaurant) due to committing a shame-inducing transgression (e.g. 86'd from a bar, making out with a friend's spouse). Typically lasts until one apologizes/settles the lawsuit to/with the aggrieved party.
Stan went on a shamecation from hanging out with Kyle after getting inappropriately drunk at his wife's birthday party and being thrown out of the restaurant for arguing with the Asian manager.
A period of time, slightly longer than normal, one goes without shaving. Ususally associated with the holidays and comes to an end in early January. Can be intentional or unintentional. In the common case of beards - the shavecation usually upsets a wife or girlfriend, and is often incorrectly mistaken for laziness.
Barbara: "Sheesh, you look like you've been on a month-long shavecation"
Walter J: "Don't worry boss, the beard will go at the end of my shavecation. See you next week"