noun
straggling hair; lovelock
Hair too short to be tied up with the rest, typically around the sideburns or nape; often seen as a charming detail. The term 後れ毛 is more common.
See also: 後れ毛
彼女のうなじのあいきょうげが、なんとも言えず色っぽい。
The straggling hair on the nape of her neck is indescribably alluring.
浴衣姿で、耳の横にあいきょうげが垂れているのが可愛らしい。
With her yukata on, the lovelock hanging beside her ear looks charming.
Ateji spelling combining 愛敬 (charm, amiability) and 毛 (hair), likely chosen for its phonetic and semantic fit. The exact origin is uncertain.