Amongst the people I game with, this strategy is known as "The Queen of Sheep", the title self-awarded to the person who first pulled this off.
This is the weakest and most set-up dependent strategy but can lead to glorious victory on the right board. Basically, you throw all thoughts of balance out the window and gamble on a single resource for which you also have the matching port. Any time I've seen a pure port strategy of this type win has been for sheep, because the other resources are valued more highly and you won't be able to sweep them all up in the same way. Also, who's going to rob you when they know they'll just get a sheep? Amongst the people I game with, this strategy is known as "The Queen of Sheep", the title self-awarded to the person who first pulled this off.