Most commonly used in the methamphetamine trade, where "smurfers" visit pharmacies and purchase small quantities of cold/flu tablets to provide to a maker ("papa smurf") of the drug.
Diane: Really? She's probably a smurfer.
Often they stay overseas for extended periods of time but always hanker for returning to the land of their birth. Often they will take with them a life partner from overseas on their return. Noted for their beauty and brilliant personality the selected partner should feel greatly honoured and extremely fortunate that the smurfer chose them as The One.
I hope a smurfer selects me someday.