Smart, strong, and she's seen some shit. Don't try to tell her your trauma bullshit, she's got her own but you'd never know because she doesn't need to talk about it. She's the softest and hardest, sweetest and sassiest lady you're ever going to encounter.
To be passive-aggressive in a sassy tone of voice. The passive-aggressive comes from the words you use, while the sass comes from the vocal inflections you use when talking. It is more effective than just being sassy or passive-aggressive because you can use both at once for a double-whammy of insults.
*Two girls talking*
Girl 1: Do you like my new shirt? I picked it up at target.