Half Cocked
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Takanakuy (Quechua for "to hit each other") is an annual established practice of fighting fellow community members held on 25 December, by the inhabitants of Chumbivilcas Province, near Cuzco in the Peruvian Andes. The practice started in Santo Tomás, the capital of Chumbivilcas, and subsequently spread to other villages and cities, the prominent ones being Cuzco and Lima. The festival consists of dancing and of individuals fighting each other to settle old conflicts.
This is similar to "airing of grievances" and "feats of strength" during Festivus celebrations.

[media]https://www.youtube.com/watch?v=NoYkoRuWM5Y[/media]
[media]https://www.youtube.com/watch?v=AtzUmZZ9nH0[/media]
[media]https://www.youtube.com/watch?v=wGKhJEK6IGc[/media]