The phrase "delusional world" refers to a mental state where a person has false beliefs or perceptions that differ from reality. It means living in an imagined or distorted version of the world rather than accepting the truth. Full definition
Similar to other posts, you are living in your own little delusional world of man - made supernatural myths. (religion.blogs.cnn.com)
The defining criterion of mental illness is that an individual lives only in his solitary delusional world, unable to participate in the ordinary world of those around him. (firstthings.com)
If gazidis thinks we're going to get 85 points after selling sanchez he's living in the same delusional world that wenger inhabits. (arsenalarsenal.net)