1. A day when one's hair seems unmanageable; often then developing into a day when everything seems to go wrong, and one becomes increasingly irritable

Derived forms: bad hair days

• lung
• lung cancer
• lung-like
• lung-power
• lunge
• lungen
• lunger
• lungfish
• lungi
• lungless salamander
• lungwort
• lungyi
• lunisolar
• lunisolar calendar
• lunitidal interval
• lunk
• lunkhead
• Lunt
• lunula
• lunule
• Luo
• Luoyang
• Lupercalia
• lupin
• lupine