A fork of Rural Dictionary
british slang for some one who is insane
man that nigel is one mad cracker!
1. insane person, psychotic i've seen it happen before
holy shit, that's a bloody mad cracker, look at him beat the shit out of that guy with no remorse
Foolish, confused, crazy, deranged, not mentally sound. Used to describe someone who is no longer playing with a full deck of cards.
For lack of psychiatric care, Van Gogh eventually went mad as crackers, cut off his own ear and gave it to a prostitute.