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Use "armpits" in a sentence
"The webbing in his armpits is sometimes there and sometimes isn’t, it depends on the artist."
"After many inquiries and defeats, there was pointed out to them in a lane, a very small cottage residence, with a board across the open doorway, hooked on to which board by the armpits was a young gentleman of tender years, angling for mud with a headless wooden horse and line."
"Between their armpits was their mouth, armed with long jaw bones, like a parrot's beak."