絶ぜっ壁ぺき頭あたま

noun

flat head; flat back of the head

Colloquial term for a head shape where the back is flat, often from sleeping position in infancy. Compare 短頭 (brachycephaly), which is a medical term.

See also: 短頭

• 赤あかちゃんの絶ぜっ壁ぺき頭あたまが気きになるなら、向むき癖ぐせを直なおすといいよ。

  If you're worried about your baby's flat head, it's good to correct their preferred sleeping position.

• 彼かれは自じ分ぶんの絶ぜっ壁ぺき頭あたまを気きにしている。

  He's self-conscious about his flat head.