Definition of 身八つ口 (みやつぐち)
みやぐち
                        身八つ口
みやつぐち
miyatsuguchi
noun
•
                
small opening in the side of some traditional Japanese clothing for women and children (e.g. kimono, yukata) (located where the sleeve meets the bodice, below the armpit)
Other readings:
                身八口【みやつぐち】
                Related Kanji
| 身 | somebody, person, one's station in life | 
| 八 | eight, eight radical (no. 12) | 
| 口 | mouth |