After a homewrecker wrecks your relationship, you can become a holewrecker. Basically you punish the homewrecker with a gaping asshole.
"You know how Sophia is a homewrecker?"
"Yeah, well I became her holewrecker."
Sunday's clown is a reference towards sin confession booths; and the people that are in them.
My wife goes and sees Sunday's clown on a sunny afternoon.