The Cambridge Dictionary has officially added the viral slang word “delulu” to its 2025 update. The term, short for “delusional,” is used on social media to describe someone who believes in unrealistic dreams or fantasies.
The word has become popular in fan communities, where being “delulu” often refers to clinging to romantic or celebrity fantasies.
Other Trending Words Added
The update also includes “skibidi,” a term linked to a surreal meme trend on TikTok, and “tradwife,” short for “traditional wife,” which describes women who embrace conventional homemaking roles.
These additions highlight how online culture and social debates shape everyday English.
Why These Words Matter
Cambridge editors say their role is to track how people really use language. Once a word becomes common and lasting in daily life, it earns a place in the dictionary.
By adding “delulu” and other internet-driven terms, the publishers show that slang is more than fleeting trends — it is part of a living, evolving language.
Language Shaped by the Internet
With each update, dictionaries aim to reflect real-world conversations. This year’s additions underline the power of memes, fandoms, and online communities in shaping modern English.
As Cambridge Dictionary adds “delulu” to its new words list, it proves that what starts as a joke online can quickly become recognised English.
