Wiktionary
bitchily
adv. In a bitchy manner
Usage examples of "bitchily".
Bond had been lying equal favourite with the ex-Royal Marine Commando who was 006 but, since Tracy, had dropped out of the field and now regarded himself as a rank outsider, though he still, rather bitchily, flirted with her.
I said bitchily, knowing it came out sounding like a bit of bad dialogue from a day-time soap but not caring.
Lesson one for the old man trying to play grabass with (what the nuisance bitchily calls) "young stuff" (when she's trying to bug me): they don't do it that way these days.