Abbreviations
TL;DR
Too long; didn't read: a one-line summary at the top of a long message, or a sarcastic reply to one.
You'll hear it as
TL;DR: we're two weeks late and need a decision on scope.
Why it matters to you.
Put the TL;DR first in anything you send to senior people. They may not read further.
Related terms.
Videos.
No video mentions TL;DR by name yet. These are on the same topic, Communication & speaking.