More likely it has changed over time. http://www.google.com/search?hl=en&source=hp&biw=1354&bih=531&q=what+is+difference+between+jigger+and+shot http://www.goo

More likely it has changed over time. http://www.google.com/search?hl=en&source=hp&biw=1354&bih=531&q=what+is+difference+between+jigger+and+shot http://www.google.com/search?hl=en&source=hp&biw=135... I'll admit, I'm old and my learning (through bartender's school, no less) reflects that. Most shot glasses will hold a jigger, but you don't fill it for a shot. Further down the page you linked, under "jigger," shows a tool we use(d). A "shot" was a drink, the "measure" was a jigger (1.5 oz) or a shot (1.0 oz). In programming terms, the word "shot" was overloaded.