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armpit

1 ENTRIES FOUND:
armpit /ˈɑɚmˌpɪt/ noun
plural armpits
armpit
/ˈɑɚmˌpɪt/
noun
plural armpits
Britannica Dictionary definition of ARMPIT
[count]
: the hollow area on a person's body beneath the place where the arm and the shoulder meet
called also underarm
see picture at human
US, informal : the worst area in a place