bangs · noun, verb1
From bang (“to cut [hair], dock [an animal's tail]”), probably from the sudden manner in which docked hair appears to burst out explosively when it's cut (i.e. "with a bang"). Ultimately from bang (“to strike noisily, explode”).
bangs · noun2
Shortened from Bang's disease.
Bangs · proper noun3
Variant of Banks.
Etymology from Wiktionary, CC BY-SA 4.0.