魔まの３さん週しゅう目め

expression, noun

the dreaded third week (of a newborn's life)

Colloquial parenting term referring to the period around the third week after birth when some previously calm babies become fussy or colicky.

• 魔まの３週しゅう目めに入はいって、赤あかちゃんが急きゅうに泣なき止やまなくなった。

  We've entered the dreaded third week, and the baby suddenly won't stop crying.

• 魔まの３週しゅう目めは多おおくの親おやが経けい験けんするらしい。

  It seems many parents go through the dreaded third week.