According to Songfacts, Fluorescent Adolescent was written by Alex Turner with his ex girlfriend, Johanna Bennett, during a Mediterranean holiday, when they were reminiscing about characters they knew at school. The video for the song was based on John Cooper Clarke's poem "Out of Control Fairground", which was written specially for the release of the single.
You used to get it in your fishnets
Now you only get it in your night dress
Discarded all the naughty nights for niceness
Landed in a very common crisis