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.