[Gonso]

A flea is kind of like a person that's more a pest more than their value as a customer, if that makes sense. I know that probably sounds kind of odd to people who might work in other customer service fields, but...

Here, try to imagine this:

A guy goes in to a pretty nice restaurant during a busy dinner. Gets a seat, orders an appetizer and coffee. Gets 3 refills, takes up a seat for three hours, smokes 11 cigarettes, complains about the coffee constantly. Finally, he leaves a mess and completely stiffs the waitress, while mumbling about how he's never coming back to this BS restaurant again. That's the rough equivalent of a flea.

Oh, and he wants a refund on the appetizer, he ate it all but it wasn't very good.