The term "delulu" is a slang version of "delusional," often used in a light-hearted or humorous context. It describes a state where someone is not seeing things realistically or is caught up in unrealistic thoughts or fantasies. The term could imply that a person is overly optimistic, or has an exaggerated belief in something that is not likely to happen.
The word "delulu" is a colloquial shorthand derived from the word "delusional." It became popular in internet slang and social media, particularly among younger demographics, often used in playful or ironic contexts.