In "The Star Fraction" by Ken MacLeod, a Scottish science fiction author, a couple walks through a street and past a "trodie". The novel is set in Britain, so it may be a British expression. The street is in a future London.
Full sentence:
"Jordan took her elbow and ostentatiously steered her past the trodie
collapsed in the doorway of a Help the Waged charity shop."
Googling the expression didn't help. I can't find any reference to it in Cambridge.
It is the only occurence in the book (Kindle Edition) and after the scene there is no further reference to the word. It's not crucial to the plot, I'm just curious what it means.
Best Answer
It's a word I made up! It's for someone who habitually electrically stimulates the brain's pleasure centres via an implanted electrode. (Like 'wirehead' in some stories by Larry Niven.)