backsliding 

To go back to talking to, dating, or having sex with a previous ex. The backslider tends to be the person who broke it off, but not always. Friends must watch out for their friends who may be backsliding especially with those who have had a recent break up and/or if they don't think the two people should be together.

Everyone worries Rhianna is backsliding into an abusive relationship with Chris Brown.

backsliding by Catfish24 December 16, 2012

backslide

verb: to have sex with someone you were previously dating or hooking up with. Specifically after a falling out or bad breakup and tends to make things more complicated.

"I knew I was going to backslide with Ben last night as soon as he walked into the bar. My friends are going to kill me"

backslide by citypretty21 March 1, 2011

backslide

verb: To revert to sin or wrongdoing, especially in religious practice.

Even after tasting true freedom in Christ, Alex found it easy to backslide into habitual ways of the flesh.

backslide by Mads Entry July 14, 2006

backslide

When one goes back to their Exs.

'I can't believe you're with her again.. Man, you're such a backslider, you always backslide!'

backslide by New Girl123 October 12, 2012

backslide window

A trecherous window of time following a break up in which both parties are prone to bone.

John isnt coming over until the backslide window closes

backslide window by The Barnacle July 29, 2009

backslide

verb: to re-adopt sinful ways after having spent some time as a pious religious person.

For about a year, we thought we lost him, but then one day Skeevo backslides right back into our lives!

backslide by F. Rodderick Hsu May 7, 2005

backslider

To revert to sin or wrongdoing, especially in religious practice

Someone who gets safed only to revert to their old sinful ways is referred to as a backslider

backslider by Greg54B July 16, 2007