My sister loved Grasshoppers in her twenties. The only reason I remember this is the pale green color of the drink - as a kid I thought it was pretty and looked like a green milkshake.
The Grasshopper is kind of a milkshake for adults, it's make with cream, has a chocolate minty taste and it really is the palest shade of green.
After Raj on The Big Bang Theory ordered them on one episode it's possible this drink might come back into the public eye again, or maybe not, but it is a pretty decent dessert cocktail and very elegant looking if you're into mint green.
Updated 9-2021
PLEASE DRINK RESPONSIBLY