To parse is to analyze something in an orderly way. In linguistics, to parse is to divide words and phrases into different parts in order to understand relationships and meaning. For example, English students are sometimes asked to parse a sentence by dividing it into subject and predicate, and then into dependent phrases, modifiers, and so forth.
Definition of apocalyptic. 1 : of, relating to, or resembling an apocalypse apocalyptic events. 2 : forecasting the ultimate destiny of the world : prophetic apocalyptic warnings. 3 : foreboding imminent disaster or final doom : terrible apocalyptic signs of the coming end-times.
Meaning explosion is from 1630s; that of noisy party, good time is from 1953, American English slang. Sense of strong current of air for iron-smelting (1690s) led to blast furnace and transferred sense in full blast the extreme (1839). Blast was the usual word for a smoke of tobacco c.1600.