1. info-dump - Noun
2. info-dump - Verb
(chiefly computing) A large volume of data supplied at the same time.
(literature) A long section in a work of fiction that reveals often tedious expository information through the voice of the narrator.
Synonym: expository lump
info-dump (third-person singular simple present info-dumps, present participle info-dumping, simple past and past participle info-dumped)
To speak expositorily and at length regarding one's knowledge about a subject.
There’s no huge info-dump at the start of the story, and yet we are thrust into a strange and alien world with its hot, glowing trees and strange six-legged creatures. Source: Internet
There wasn't an info-dump, but things were explained as they needed to be, which worked for the story. Source: Internet