It means that the beer will not continue to age in its bottle. It is beer that has not been pasteurized, and still has live yeast in it. It will continue to age in the bottle, and the character of the beer will change over time. For some kinds of beer this is good, for others it means they will spoil after a while. It is beer that has been drawn or pulled from a cask.
Ice beer is beer that has reportedly been fermented a nearly freezing temperatures.
This is another ploy by Megabrewies to convince people that their beer is something different or better than everyone elses. Ice Beers are basically another style of light American lagers. True eisebock's are beers that have been frozen after they are fermented to raise the specific gravity and alcohol content of the beer. The water in the beer turns to ice when the beer gets cold enough. The ice crystals are strained or filtered out, leaving a beer with a higher specific gravity and generally a higher alcohol content.