Green’s Dictionary of Slang

TL;DR phr.

[abbr. too long, didn’t read]

a voluntary affirmation of one’s short attention span or lack of intelligence when faced by anything beyond a brief message.

[US]C. Eble UNC-CH Campus Sl. Spring 2014 15: T.L.D.R. — < too long; didn’t read protest and request for a summary.