(uncountable, by ellipsis) Mad cow disease; bovine spongiform encephalopathy. / (countable) A cow afflicted with mad cow disease. / Used other than figuratively or idiomatically: see mad, cow.

(idiomatic) Extremely angry; furious to the point of outburst.

(idiomatic) A sum of money, often relatively small in amount, kept in reserve to use for impulsive, frivolous purposes.

(simile, informal) Extremely angry

pseudorabies in cattle

plural of mad cow

plural of Mad Lib

A humorously nonsensical story created from a template with blanks for certain elements. One participant supplies words to fill the blanks (e.g. "nose" where a body part is required), and the other reads the resulting story.

plural of mad-dog

Fanatically or irrationally ferocious.