noun, plural mad·men [mad-men, -muhn]. a person who is or behaves as if insane; lunatic; maniac.

What does madman mean in UK?

countable noun. A madman is a man who is insane. [informal] He wanted to jump up and run outside, screaming like a madman. Synonyms: maniac, nut [slang], nutter [British, slang], nutcase [slang] More Synonyms of madman.

Is the word madman offensive?

Madman is an old fashioned, derogatory term for a severely mentally ill person. These days, calling someone with a serious psychiatric illness a madman would be offensive.