Word

delulu

adjective B2

/dɪˈluː.luː/

Meanings

adjective

Having unrealistic beliefs or hopes, often used humorously online.

noun

A person who has unrealistic beliefs or hopes (informal slang).

Definition

Delulu describes a person who holds an unrealistic belief or hope, often in a playful or critical way.

Delulu is informal slang, especially common online, for being “delusional” about something. It is usually used when someone strongly believes a fantasy or unlikely outcome, such as a relationship or success, despite clear evidence. People often use it jokingly, but it can also sound dismissive or rude depending on the context.

Examples

I was being delulu when I thought I could finish the whole project in one night.
You sound delulu if you think the stadium will be empty on a holiday weekend.
He went delulu and assumed a famous singer would reply to his message.
They joked that she was delulu for planning a perfect wedding before even dating anyone.

Common mistake

Learners sometimes use delulu in formal writing, but it is very informal slang and sounds inappropriate in academic or professional contexts.