info-dump

Meanings

1. A large volume of data supplied at the same time.
2. A long section in a work of fiction that reveals often tedious expository information through the voice of the narrator.
3. 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.

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

Etymology

Compound of info + dump.