Clever abbreviation

TL;DR

Twitter/SMS/internet speak for 'Too long; didn't read'.

TL;DR is in the Oxford Dictionary since 2013

What about TL;DL or BTT?

When listening to priests at Mass. 'Too long; didn't listen' or 'Bored to tears'. 

This from Google on TL;DR

The abbreviation is based on the principle that, if the writer does not invest the time to convey their message concisely, the reader is justified not investing the time to read it. Alternately, it might mean that there is insufficient material of value or interest to justify the time required to read it.