neighborhood bicycle
(Refers to a neighborhood that only has one bicycle, so everyone has to share it.)A person, usually a female, who has had sexual relations with many different people. i.e. "everyone gets a ride." slut
That girl has slept with every guy I know. She's the neighborhood bicycle.
Neighborhood bicycle
Someone who has everyone has "ridden" (slept with) in your community. Usually a milf or a hoe. This woman is also probably very or highly attractive.
So your mom is the Neighborhood bicycle huh.