Jack Daniels. In a 1-oz. serving of Jack Daniels whiskey, which equates to a little less than a full shot at a respectable bar, contains about 69 calories. While that may not seem like a lot, after a couple of these bad boys mixed with cola, you've racked up quite a few calories. Jose Cuervo.
Medical Definition of black widow. : a venomous New World spider of the genus Latrodectus (L. mactans) the female of which is black with an hourglass-shaped red mark on the underside of the abdomen; broadly : any other spider of the genus Latrodectus.
Black widow spider. The ominously named black widow is a shiny black spider, but the females have an even more ominous hourglass-shaped mark on their abdomens, as if to say time is running out.. They earned the name widow because the females of many species eat the males after mating.