ETYMOLOGY
variant of taradiddle (a trifling falsehood, a petty lie)
EXAMPLE
“…Oh, don’t call them lies, sister; it’s such a strong, ugly word. Please call them tallydiddles, for I don’t believe she meant any harm. Besides – besides – if they should turn out to be truth? Really, sister, that’s the weight on my mind; so many things sounded as if they might be true…”
From: Wives & Daughters
By Elizabeth Gaskell, 1866
Lexicophilia 