sassy
Someone who is throwin’ a lot of attitude in a sarcastic yet truthful manner. They posses saucy tendencies with hint of a smart-aleck, snarky crass.

Example:
Coworker Tim: Jon, you sassy af.
Coworker Jon: What do you mean?
Coworker Tim: You know exactly what I mean. Quit with that sass.
Jon, you sassy af.