TL;DR
acronymops cultureweb dev
Stands for: too long; didn't read
Too long; didn't read: the complaint that became the standard label for a summary.
Born on forums as a dismissal of walls of text, TL;DR flipped polarity: writers now preempt it by opening with a TL;DR section, and the abbreviation means the summary itself. Engineering culture institutionalized the move in RFC abstracts, executive summaries, and incident reports where the first three lines must carry the payload. It is attention economics compressed into five letters and a semicolon that most people omit.