buttock; butt cheek
Rare term for the fleshy part of the buttocks; more common words are お尻 or 臀部 (でんぶ).
He fell off the chair and hit his buttock.
Most common spelling; uses kana for たぶ to avoid rare kanji.
Rare kanji spelling; 臀 is not a jōyō kanji. Also read しりこぶた or しりたぶら.
Compound of 尻 (しり, 'buttocks') and たぶ, a dialectal or colloquial word for a plump, rounded part, possibly related to たぶら (plump). The exact derivation is uncertain.