This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. The hollow under the upper part of the arm at the shoulder.

n. Slang The most miserable or undesirable place in a particular area.

n. The cavity beneath the junction of the arm and shoulder.

n. Somewhere or something considered foul.

n. The hollow beneath the junction of the arm and shoulder; the axilla.

n. The hollow place or cavity under the shoulder; the axilla.

n. the hollow under the arm where it is joined to the shoulder

"Also, making fart noises with your armpit is hilarious."

cavum    cavity    bodily cavity   

armhole    axilla    oxter    underarm    under-arm   

groin    buttock    thigh    forearm    shin    torso    biceps    pelvis    abdomen    midsection