malarkey

Reader's DigestのWord Powerのクイズで分からなかった二つの単語の一つは "malarkey" で、その意味は雑誌では簡単に "foolish talk" となっていましたが、辞書で確認します。
・Oxford English Dictionary: Meaningless talk; nonsense: Don't give me that malarkey.: All of us in the band are having to learn about this showbiz malarkey as we go along.
・Cambridge English Dictionary: silly behaviour or nonsense: I like the socializing but I can't be bothered with dressing up and all that malarkey.
語源が気になりましたが、ほとんどの辞書は不明としています。
World Wide Wordsの冒頭個所のみを下に引用します。
Malarkey is meaningless talk, nonsense or foolishness.
It’s still known in the US and to a lesser extent in the UK and elsewhere, but where this odd-looking word comes from is decidedly uncertain. What we do know is that it began to appear in the US in the early 1920s in various spellings, such as malaky, malachy, and mullarkey. Its first known user was the cartoonist T A Dorgan, in 1922, but it only began to appear widely at the end of the decade. By 1930, Variety could pun on it: “The song is ended but the Malarkey lingers on.”