OLFAN is a common expression meaning “oh lord for a night.” It is used to express shock and surprise in many texting conversations. This phrase stems from old english,
originally used to express displeasure with the french king. Notably, it excludes any complex words brought by the French monarchy. Over the years, it evolved to have a more positive connotation and was
eventually reclaimed by the French. It is a common
vernacular in French texting, and English speakers are using gradually integrating it into their speech.