|A type of literature which tries to reproduce, as accurately as possible, the manner in which ideas flow thru the brain, one thought giving rise to another related to it in the most unlogical way, employing shorthand symbols for familiar concepts the way the mind does, ktp.
from Fancyclopedia 2 Supplement ca. 1960:
Walter Breen points out that one of the key points in this type of writing was thatthoughts gave rise to others by socalled "clang associations" -- resemblances of sound, rather than sense or other logical association. Clang associations are, of course, also the basis for our great art-form, the pun.