I hear the term "shot out" thrown around quite a bit, and I'm wondering about peoples own definitions or qualifiers. Is it an age thing, or time in the industry, or a lack of any remaining "firsts" as far as sex acts? (anal, group, IR, etc.) Specific examples and or pictures are, of course, much appreciated.

Just went to Urban Dictionary, does this term have something to do with the years of little sleep, perpetual dehydration, drug and alcohol abuse and just the lifestyle? More to do with how haggard somebody looks than how much they've actually "shot" scenes?