The story
From under- + arm. The armpit sense is not old, historically speaking (1920s), and it is believed to have arisen as a euphemism in advertising.
Etymology from Wiktionary, CC BY-SA 4.0.
underarm
Today it means: The armpit. Full definition →
Today it means: The armpit. Full definition →
From under- + arm. The armpit sense is not old, historically speaking (1920s), and it is believed to have arisen as a euphemism in advertising.
Etymology from Wiktionary, CC BY-SA 4.0.