The phrase "a bit bitchy" is correct and usable in written English.
It can be used to describe someone's behavior or attitude that is perceived as slightly rude or unpleasant, often in a playful or light-hearted context.
Example: "Her comments during the meeting were a bit bitchy, but I think she was just having a bad day."
Alternatives: "somewhat snarky" or "a little catty."
"When I was at drama school I had quite a lot of wet, ingénue parts, so I'm delighted because it's much more fun playing someone who's a bit bitchy.
As chief White House correspondent for the Washington Herald, she might've been a bit bitchy about defending her turf, and slow to respond to a challenger, but otherwise things seemed pretty OK.
This might be a bit bitchy, but can anybody now even remember that half-series when Jenna Coleman was paired with a departing Matt Smith and it just didn't really work at all?
The band defies the laws of time, human endurance and pop-culture physics, but it remains a spiky alliance, especially after the publication of "Life," the Keith Richards memoir that got its harshest critique ("a bit bitchy," "tedious") from a frenemy named Jagger.
She is strong willed and she gets a bit bitchy if someone is messing with her or with her family, she can definitely kick your butt.
And so I've always been blessed to be in communities where we were a bit edgy (and bitchy too), discontented with the current way of things, seeking more.
Incensed by her endless excuses in the marital bed, he apparently compiled a list of every reason she'd given him for not wanting sex that night ("I'm tired", "I'm watching my show", "I'm still a bit tender from yesterday") replete with bitchy asides about how or why they didn't ring true ("I feel sweaty and gross, I need a shower" had the note next to it "Didn't shower until the morning").
She was only 19 when she wrote Lady Susan, an epistolary novella, and though sharp social satire obviously remained a bit of a staple for her, Austen was never as drippingly bitchy as when young.
They accuse you of insulting them and offending them, and will tell you you're sounding a bit 'moody' or 'bitchy' to them.
