Flight Crews Call Passengers “Mermaids” – Not a Compliment, But a Secret Code for Annoying Behavior

Airlines have a private language and one term in particular has recently drawn attention for its blunt honesty: “mermaid.” Flight attendants use this slang not as a compliment, but to describe passengers who spread themselves across multiple seats, effectively taking more space than their single ticket allows. The term, confirmed by industry insiders, reveals an informal code used by cabin crew to communicate observations about passenger behavior without alerting the individuals involved.

The meaning of “mermaid” in aviation slang was explained by Pilot Kolin Jones of Amalfi Jets, who described it as referring to a passenger who takes up more space than their single seat allows — effectively manspreading across a row. Jones emphasized that it is not an official FAA term but part of the evolving shorthand crew members use to discuss the cabin environment discreetly. His explanation brought wider public attention to the term after it was featured in a Travel + Leisure roundup of unofficial phrases used by airline staff.

Social media posts have further illustrated the concept, with one aviation-focused Facebook page stating plainly that “Code Mermaid” refers to a passenger who spreads across multiple seats, takes extra space, or tries to keep the whole row to themselves — essentially turning economy into first class. The post clarified that it is not an emergency code but a lighthearted way for crew to identify a specific type of passenger behavior.