swat /swɒt $ swɑːt/ BrE AmE verb ( past tense and past participle swatted , present participle swatting ) [transitive]
[ Date: 1600-1700 ; Origin: squat in its original meaning 'to crush' (13-19 centuries) ]
to hit an insect in order to kill it:
He calmly swatted a couple of flies.
—swat noun [countable]