Autultery 

That sense when you're driving an automobile other than your own (and enjoying it) that you are cheating on your car. This feeling of guilt and cheating intensifies exponentially when contemplating/financing/purchasing a new vehicle and reaches it height as you see your trade-in getting smaller in the new car's rearview mirror.

Dude 1: "Dude! You got that new Jeep! Niiiiiiicce!!!"
Dude 2: "Oh man... I love this car but I feel like SUCH an autulteror."

OR

Woman parks new car all the while avoiding looking directly at old car parked in driveway which she has not driven in awhile (and frankly hasn't missed). She pats it on the hood with a grimace and mumbled apology because she feels like she's committing autultery with the new, nicer car.

Autultery by mel268 January 31, 2010

Netflix Adultery 

Watching a film alone on Netflix and denying it, then getting busted when spouse checks your Recently Watched list.

"I got caught committing Netflix Adultery when my husband found out I'd watched The Bourne Legacy after he fell asleep."

Netflix Adultery by Salome Wilde March 19, 2013

adultery 

A married person sleeping with somebody other then their SO, whether or not the other partner knows about it.

Sleeping with a married couple is adultery on the part of all three people.

adultery by Loki April 10, 2002

Adultery 

Cheating. Straight up cheating on your wife or husband. Simple as that. Now go read a book.

Y'all seriously couldn't have just googled adultery?

Adultery by Nadia Duffett May 28, 2018

adultery 

Adultery is behaving like an adult in a primal sense.

Some consider adultery as a potentially dishonest sexual act, and use verbs such as commit. ie She committed adultery. Some consider adultery in the same sense as a greeting or a handshake, and simply behaving like an adult. Hence the word ADULTery.

adultery by Newfie blogger December 25, 2018

adultery 

The ultimate act of betrayal and dishonesty against your spouse by sleeping with someone else or as they say "parking your car in another woman's garage."

As wrong as adultery is, its primary cause is one of the married partners not reciving something they need emoptionally or physically from their spouse.

Adultery is wrong, wrong, wrong with a capital-W!

adultery by [e-mail] March 16, 2008

Adultery 

voluntary sexual intercourse between a married person and someone other than his or her lawful spouse.

Mahfouz Al-Khouri committed adultery after he beat his wife and brought a Syrian prostitute to live with him.

Adultery by Zana Shaheen January 18, 2011