When you're on the verge of doing something awesome but back out at the last second or fail to accomplish your objectives due to cowardice.
Whether it's gaining a sizable lead during a Street Fighter match but ultimately losing or posting an inflamatory response on the forum then deleting it are two common examples of how to bottle it.
Another Word for Mountain Dew, drink of the gods. The origin of this word is unknown but it sure is fun to say. Also sometimes called Mountain Bartle Skeet. Most often used by hicks or rednecks.
Person 1: Pass me an Ice cold can of Bartle skeet.
Person 2: But Mountain Dew gives you kidney stones.
Person 1: I want my BARTLE SKEET!