family bike
A motorcycle or scooter designed for family use, often with a step-through frame, storage, and comfortable seating for a passenger. Common in Japan as a practical vehicle for errands and short trips.
I take my child to kindergarten on the family bike.
This family bike has good fuel economy and is handy for shopping.
Variant with interpunct; less common but still seen.
Wasei-eigo (Japanese-made English) from 'family' + 'bike'. Not a direct loan from English.