A derogatory term for a foolish person. The reading ばかもん is a colloquial or dialectal variant, often heard in rough or old-fashioned speech.
Don't bother with that fool.
He was called an idiot.
Standard kanji spelling.
Katakana spelling of 馬鹿, often used for emphasis or in casual writing.
Compound of 馬鹿 (foolish) and 者 (person). The origin of 馬鹿 is uncertain, with theories including a reference to a Chinese historical anecdote or a corruption of Sanskrit 'moha' (ignorance).