tl:dr

Too long didn't read is normally used in reddit post after lengthy paragraphs

Reddit user 153: a huge paragraph blah blah blah blah blahblah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah

TL:DR *summarises the paragraph*