Gandhi has been accusing Modi of speaking "lies" on various issues, including on the Rafale jet deal.
"There's a new word in the English Dictionary. Attached is a snapshot of the entry," he tweeted, ending his sentence with a smiley.
Gandhi also put up a picture of a screenshot of a photo-shopped page of an English dictionary explaining the meaning of "Modilie".
In the fabricated page, "Modilie" is described as a "mass noun".
The photo-shopped page lists three meanings and examples of the usage of the word.
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