Flooftusi (floofinition) – dance performed by some household pets, it usually involves the creature sitting still and moving nothing but its head, often as it watches something. Cats will often perform the dance inline while watching birds. If they add chattering to the dance, catologists call the variation the bird-tusi.
In use: “Lined up at the window, the three felines watched birds and performed an admirable variant of the flooftusi that’s known as the bird-tusi.”
Michael Seidel, writer 
Doodle and IttyBitty in particular seem to prefer doing a “mosh pit” version of the flooftusi, which includes body-slamming the window beyond which the birds (mostly sparrows, a.k.a. feathered piranha — they can strip a bird feeder bare in under two hours) are doing bird stuff.
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Hah – yes, floof pits are very popular with some felines, as is floof-slamming (which gives me a headache just to witness). Love that tag – “feathered piranha”. Terrific.
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