Billionaire investor with the colourful name, T. Boone Pickens, is so hacked off with Yahoo's refusing to sell itself to Microsoft, he has taken a huge loss and flogged all his shares.

Pickens told the San Francisco Chronicle that he sold all 10 million of his Yahoo shares at a loss, because he grew frustrated with the company always telling Microsoft to go forth and multiply. He said the Board was pathetic and the move probably lost him tens of millions of dollars.

What is strange is that he didn’t use the Board's Annual Meeting on Friday to help lead a shareholder revolt against Yahoo Chief Executive Jerry Yang and his fellow board members.

Pickens said he invested in Yahoo largely as a bet on activist investor Carl Icahn, who had launched a campaign to oust Yahoo's Board in hopes of reviving Microsoft's takeover bid.