TL;DR

From Fandom wank wiki

tl;dr: Too Long; Didn't Read

An acronym not originating on FW, but occasionally used there. It first became popular during the But what are your thoughts on yaoi? implosion. It's most often used when wankas in Fandom Wank decide the links aren't providing all the wank they desire, and thus write huge, long, and frequently boring screeds about the topic du jour. Also, it can refer to the content in the links, in which people write long diatribes rivaling the length of War and Peace just to justify their wank. This is common in Harmonian far too many wanks.

Sometimes the acronym is pronounced and/or written as "Teal Deer", as in "I apologize for the teal deer in my comment above."

There is also the much less famous TS;DR (Too Short; Didn't Read) but can still be used for wanking anyway.

• See also: EncyclopediaDramatica's best tl;dr article ever