sleep-cheating 

being in a relationship, saying yes to a new relationship then breaking up with the original in the morning.

jill was caught sleep-cheating with jack because bill asked her out and she said yes before breakingup with jack in the morning.

sleep-cheating by esoreinalem October 18, 2010

Cheating 

When one person has a significant other and performs any type of intimate acts with another person.

I caught my boyfriend cheating on me with another girl.

Cheating by Erin August 14, 2003

cheatingest 

Cheating but covered by FivePoints Vids

The (Blanks) are the cheatingest team in (sport)

cheatingest by Sacul rellim June 22, 2020

cheating whore slut 

Someone that cheats on someone else for 3-4 months. They usually lie about everything, and act as if they know everything. This person may have a name that stats with A and ends with ber

That cheating whore slut cheated on me for 4 months. Fuck her.
Amber is a cheating whore slut.

cheating whore slut by funeral wolf September 28, 2008

Cheating 

To date, have sex with, or kiss/make out with someone someone else while you are in a relationship. These people who cheat are disrespectful, selfish, fuckboys/sluts, and pretentious.
If you are married, this is sometimes called adultery

E.g. 1) Mike: Hey Dave, hows it going with your girlfriend?

Dave: Broke up with her, she was cheating. There's 5 months i'll never get back.

E.g. 2)Brittany: Ugh, Sally, my boyfriend was cheating on me. We were together for over a freaking year! How could he?

Cheating by a fallen star xxx April 17, 2019

Cheating Cunt 

A slimeball that cheats at football.

Thierry Henry is a cheating cunt

Cheating Cunt by DerangedAngel November 20, 2009

Cresting 

Cresting is when you reach a point of such pleasure during sex or masturbation that you know that one or two more strokes and you’ll cum. Like being right on the crest of the ultimate final pleasure wave.

Man I was cresting for a long time before I finally tugged that sucker all over her face. On reflection I think she would've preferred a different wake-up call...

Cresting by Cap'n B! Oh Yeah! July 7, 2008