A Cunting
A cunting is when people are so buddy-buddy that it makes everyone else want to scream. You can add as many people as you want to make it even worse.
Your friend and his best friend are a cunting to cunting and it's driving everyone else crazy.
Your whole class is a cunting to cunting to cunting and no one can focus on anything.
Your mom and dad are a cunting to cunting and they fight about it all the time.