This appears to be a non-standard word; it may be a whimsical or invented term for behavior involving flipping or casual actions.
Possibly a blend of 'flipper' or 'flippancy' plus the suffix '-ery' (which creates nouns for collections or types of behavior, as in 'trickery,' 'sorcery').
Words ending in '-ery' often describe whole categories of behavior (trickery, skullduggery, flummery), so 'flippery' has just enough linguistic logic to feel like it should exist, even if it doesn't officially.
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