Adultler 

Like an Adulterer, but much worse. Someone who cheats on their spouse so much, they are akin to the Hitler of dating. It is rumoured that the original Adultler had as many as 6 million affairs in an event dubbed "The Hole-a-caust". Hole-a-Caust deniers say this is greatly exaggerated and that the actual number is likely much lower, perhaps 10 or 20.

"Well, duh... of course he cheated on you... he's a total Adultler"

"You sir, are worse than Hitler - you're an Adultler"
Source: adamfromtheblok, Canada, eh?

Adultler by adamfromtheblok December 18, 2005

Adultler 

A person of adult age (18+) that acts like and throws tantrums like a toddler when their entitlement and first world problems are the worst. A word for someone who cannot grasp the concept that life happens and things don’t always go their way.

Karen is an Adultler.

Adultler by RockinMarcie September 4, 2021

adulterer 

a man who cheats on his wife.
a man of low morals or character.
man of little integrity.

He cheated on his wife. Pond scum.

adulterer by lob February 24, 2005

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