A roll of 4 on a pair of six-sided dice in the game of craps (Gardner 1978, p. 256). The probability of rolling "a little Joe" is 1/12, or 8.333...%.
A roll of "4 the hard way" (i.e., 
, as opposed to 
) is sometimes called "Little Joe on Viagra."
Little Joe
See also
CrapsExplore with Wolfram|Alpha
References
Gardner, M. Mathematical Magic Show: More Puzzles, Games, Diversions, Illusions and Other Mathematical Sleight-of-Mind from Scientific American. New York: Vintage, 1978.Referenced on Wolfram|Alpha
Little JoeCite this as:
Weisstein, Eric W. "Little Joe." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/LittleJoe.html