Awkward conversations about past relationships or issues in a current relationship.
Example 1
Jim: Wow, Stacey and I were talking last night and she started going on and on about communication, being open with my feelings and all that crap!
Larry: Man, don't you hate it when chicks bring up all that relationshit!
Example 2
Laura: Kevin and I got into it about how his ex was more touchy, feely than I am. I can't stand this relationshit!