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The hunger games version of 'hashtag'. instead of putting 2 fingers together from each hand to make the hashtag symbol- you put 3 ( the hunger games 'salute').
Post an instagram photo and in the caption write "Mockingtag : katniss"

When having a bad day. Clap three fingers together while saying "Mockingtag - FML"
by HannahMontannah February 04, 2014
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