The religious belief that every word of the sacred texts is literally true; stereotypically in Christianity and taken to such extremes. See also: fundamentalist.

when you're hungover as shit after a spending a night drunk as a skunk

Fundamentalism including religious fundamentalism is a paradigm in which mediums are viewed as objects (experiences).

This leads to a dogma known as structuralism or rationalism.

Fundamentalism is in extreme conflict with subjectivity which posits that experiences or objects are themselves mediums.