A serious mental malady whereby you are convinced that you have sufficientpersuasion/hyping-capabilities to sell ice to Eskimos.
Billy Mays is said to have been so skilled at salesmanship that he could sell ice to an Eskimo, but I never found him all that appealing or convincing, so maybe he just had buypolar disorder if he actually thought that about himself.
The act of always buying, selling, trading for the next best thing. A better guitar, a new golf club, a different fishing pole. This takes place without regard for cost or loss of money. Also often times includes remorse for selling the item later on.
My Buypolar struck again. I just traded a custom guitar for a vintage guitar. Turns out I lost $500.00 in the deal. I saw the shade top on the vintage and just had to have it though.