A perfect word that can be used in a setting where vulgarity could cause embarrassment. If in the company of grandparents, parents, authoratative figures, or Tipper Gore, ninnymuffins is the perfect substitute. Special note: should only be used by "extreme caucasians".
Don't say, "You've really pissed me off now, you piece of shit."
Instead, say, "You've angered me immensely, you ninnymuffin."
Don't say, "I want to fuck you".
Instead, say, "Let's get to ninnymuffining!"
Don't say, "Goddamnit!"
Say, "Oh, Ninnymuffins!"