Meaning

• To be or become mad.

• To madden, to anger, to frustrate.

Meaning

• Insane; crazy, mentally deranged.

  "He's got this mad idea that he's irresistible to women."

• (chiefly US; informal in UK) Angry, annoyed.

  "Are you mad at me?"

• Bizarre; incredible.

  "It's mad that I got that job back a day after being fired."

• Wildly confused or excited.

  "to be mad with terror, lust, or hatred"

• Extremely foolish or unwise; irrational; imprudent.

• (usually with for or about) Extremely enthusiastic about; crazy about; infatuated with; overcome with desire for.

  "Aren't you just mad for that red dress?"

• (of animals) Abnormally ferocious or furious; or, rabid, affected with rabies.

  "a mad dog"

• (chiefly Northeastern US) Intensifier, signifies an abundance or high quality of a thing; very, much or many.

  "I gotta give you mad props for scoring us those tickets.   Their lead guitarist has mad skills.   There are always mad girls at those parties."

• (of a compass needle) Having impaired polarity.

Meaning

• Intensifier; to a large degree; extremely; exceedingly; very; unbelievably.

  "He seems mad keen on her."