Irish Whiskey Killer

Here's that promised St. Patrick's Day cocktail. I'm pretty sure I invented it and specifically remember coming up with the name "Irish Whiskey Killer." However, my use of the term "jigger," leads me to believe that another cocktail inspired this one. Regardless of origin, here what is by far my favorite drink featuring Irish whiskey.

IRISH WHISKEY KILLER

1 jigger Irish whiskey

1/2 jigger grapefruit juice

1 teaspoon honey

Combine ingredients, shake with ice, and strain.