Pig
If anybody called you a pig, you could declare that it stood for "Pretty, Intelligent Girl", and was thus a compliment.
written by an*nymo*s us*r, approved by Phil

If you're wise to the "pretty, intelligent girl" conversion for PIG, then call the girl a PIP, which is the nice compromise of "pretty intelligent pig".
written by Cr*ig Hu*son, approved by Log