info-dump

A large volume of data supplied at the same time.

Unfortunately, too many corporate meetings are info-dumps — convened for the sake of information exchange, which is more efficiently handled by phone or fax […]

A long section in a work of fiction that reveals often tedious expository information through the voice of the narrator.

An act of sharing a large amount of information on a subject one is interested in, particularly as an activity by or among autistic people.

To speak expositorily and at length regarding one's knowledge about a subject.