when a friend has started dating his friend ex whilst staying in the friend group as everyone involved, this also includes people in the group that like other people in the same group but are friends with the other ex. Breaking the bro code simultaneously.
steve goes out for Lara for about a month but it didn't work out, after a few weeks Lara goes out with bob, committing group incest but not severely. However, as they were dating steve was simping for Lara clearly prioritising plans with her above everyone else clearly committing group incest. All in all this situation wouldn't happen if the group would not commit group incest.
by @annonymous123 December 27, 2020
Get the Group incestmug. 
The act of shipping or the existence of a couple that have a sibling relation ship or are adopted siblings
''omg did you read that JayDick fanfiction?''
''No dude! They're like brothers that's spiritual incest!''
''No dude! They're like brothers that's spiritual incest!''
by Insert Dorky Nae May 9, 2017
Get the Spiritual incestmug. the feeling you get when two of your friends suddenly get close and act like a couple when they insist they’re just good friends. Instead of being cute, though, it just makes everyone feel creeped out. It’s like watching a brother and sister flirt....
“Have you seen the way Rachel and Nick have been acting lately?”
“Yeah man, it’s giving me incest vibes”
“Yeah man, it’s giving me incest vibes”
by Sheeepherder December 19, 2017
Get the incest vibesmug. A Fordham residence hall (name we won’t mention). If you don’t kiss the homies goodnight, give them head on their birthday, and take group showers you’re not valid.
by CocksorryCockImeanCocksorryMom September 27, 2021
Get the Incest Dormmug. by V tha boy November 15, 2019
Get the Eskimo Incestmug.