malarkey
Nonsense; rubbish.
informal
I decided it was a bunch of malarkey and stopped reading about halfway through.
Where it comes from
Of unknown origin; the word was popularized by the Irish-American cartoonist Thomas Aloysius (“Tad”) Dorgan (1877–1929), who started using it in cartoons on March 9, 1922. Maybe from Irish mallachtóireacht or Greek μαλακίες (malakíes)
Adapted from the Wiktionary entry malarkey (CC BY-SA 4.0).