. To pronounce it, imagine Speedy Gonzales
or Ren Hoek
There is also a verb form, pimpin suru, "to be lively." When one of my friends in college Japanese happened across the following sentence in a text:
Ojisan wa hachijûsai desu kedo, mada pimpin shite imasu.
Grandpa is eighty years old, but he is still lively.
...he translated it as "Grandpa is eighty, but he's still pimpin'