Etymology

bakunyuu

B3A1K5U1N1Y4U1U1

Today it means: A pair of very large breasts. Full definition →

Japanese 爆乳
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The story

  1. Japanese · borrowed from爆乳
  2. English todaybakunyuu

Unadapted borrowing from Japanese 爆乳 (bakunyū), from 爆 (baku, “bursting”) + 乳 (nyū, “breasts”).

Etymology from Wiktionary, CC BY-SA 4.0.