wag-wanton · noun1
Compound of wag + wanton, referring to the shaking of Briza flowers in the breeze.
wag-wanton · noun, adjective, adverb2
Formed independently as a compound from the etymology above, with wanton being used in the sense of sexual promiscuity. First attested in 1601.
Etymology from Wiktionary, CC BY-SA 4.0.