Pronunciation: [ muh-lahr-kee ]
Definition: noun
1: meaningless talk; nonsense
2: speech or writing designed to obscure, mislead, or impress; bunkum

Origin: 1920s
Etymology: an Americanism dating back to 1925–30; unknown origin
Usage:

Synonyms:
balderdash
drivel
foolishness
hogwash
nonsense
Antonyms:
sense
truth
Example: The newest teacher at the school does not tolerate malarkey in her classroom.