Swat

google

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early 17th century (in the sense ‘sit down’): northern English dialect and US variant of squat.

wiktionary

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Alteration of squat. [1]

See SWAT.

etymonline

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swat (v.)

1796, American English and northern England dialect word, possibly an alteration of Middle English swap "to strike, smite" (see swap), ultimately of imitative origin. Related: Swatted; swatting. The noun is recorded from 1800.