A phrase used to express glee when an fortunate event occurs that allows the individual to get something or "come up" on something for nothing. In lamest terms, getting something for nothing.
"Betting on the Come" is derived from a gambling expression and means you don't have what you want or need, now at the moment; but, you are betting or hoping you will have what you want or need when the time come
To work yourself into the proximity of your desired subject with the sole purpose of shamelessly hitting on them. Said subject is usually aware of your stalking and may be seen rolling her eyes and muttering, Lord, he is creeping up on the come up AGAIN!'