belly button
belly button
noun
/ˈbeli bʌtn/
(also tummy button)
(informal)
​the navel (= the small round part in the middle of the stomach, on the front of somebody's body, where the umbilical cord was cut at birth)
TOPICS Body C2
e.g.
Including all my major crevices...and between my toes and in my belly button...which I never did before but sort of enjoyed. 主だった割れ目　足の指の間　おヘソ　生まれて初めて洗った (/yupeco/『ホーム・アローン』)