A moped is a person you are
having fun dating, but would never want
your friends or family to meet because they are ugly or a total loser.
Like a moped your date is fun to ride, but you would never want
your friends or family to see you on it.
I've been seeing a girl for several months, but I can never
introduce her to
my friends or family because they would
make fun of me because she is a total moped.