Jackie and Dr. O'Hara are total BFF. The later often treats the former to a fancy lunch.

Nurse Jackie Season 1 Episode 7 Quotes

Jackie: Zoey, come here. Put your hand on here. Hold it firmly.
Zoey: I can do that. Sorry, I'm just saying I could do more important things here.

Jackie: (to "God"): Stop picking on my nurses! Alright, pick on criminals, pick on white guys!