man-on-a-horse: an edible agaric with yellow gills and a viscid yellow cap that has a brownish center
agaric: a saprophytic fungus of the order Agaricales having an umbrellalike cap with gills on the underside
noah's flood: (Biblical) the great deluge that is said in the Book of Genesis to have occurred in the time of Noah; it was brought by God upon the earth because of the wickedness of human beings