when something goes wrong
usually used with anything to do with computers
occors a lot on any microsoft based operating system especially on a programming language invented by sun microsystems
particularly when you are on a deadline
From the root 'fundametal' this is slang for the underlying principle in something usually complex.
Usually used in place of 'secret' when enquiring someone about their sex life, their recipies, their smooth hair, their popularity et cetera.
a: what is the funda of a cryogenic engine?
b: solid fuel, you dumbass