not know the first thing about

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not know the first thing about (something)

To not know anything about something. I don't know the first thing about computers, so you'll have to explain this to me really slowly. What's an attachment again? Geoff wouldn't know the first thing about how to take care of a baby. Thank goodness Frank is there to help babysit.
See also: first, know, not, thing

not know the first thing about someone or something

Fig. not to know anything about someone or something. I don't know the first thing about flying an airplane. She doesn't know the first thing about John.
See also: first, know, not, thing

not know the first thing aˈbout somebody/something

know nothing at all about somebody/something: I don’t know the first thing about Chinese history.
References in classic literature ?
I said at the time that the only reason we took Captain Doane in with us on the deal was because we needed a navigator and because you and me didn't know the first thing about it.
Whether you dont know the first thing about what happens when you flush the toilet, or youre an engineer or operator with 20+ years of experience under your belt, there is certainly something in this series for you.
And the blame is not theirs alone but also belongs to those who give them a platform on which to perform in the first place, as they try to fill their dearth of meaningful programming by keeping the Lebanese fed -- for breakfast, lunch and dinner -- on a steady diet of sermons on topics they don't know the first thing about.
Monkey finds a bicycle but doesn't know the first thing about them or how to ride one.
One furious resident said: "Enda Kenny can f**k off, him and his shower wouldn't know the first thing about helping us.
There are a few tips about the forms and practice of gameplay, but Game-Day Youth is not specifically a tutorial for physically playing the game, but rather for mentally understanding the game--even if the reader doesn't know the first thing about it.
Even if you don't know the first thing about plumbing, expect to be turning on the waterworks by the end of this ep.
It takes an awful lot for me to lose my temper Gary Lineker explains why he never got a yellow card in his football playing days Many of the people seen at county cricket matches are dead Broadcaster Jeremy Clarkson Women don't know the first thing about making money.
The 42-year-old actress, who was nominated for an Academy Award for her performance in the film 'Good Will Hunting,' asserted that she doesn't know the first thing about relationships, the Telegraph reported.
Likewise, if your grandad, for example, loves to sip single malt but you don't know the first thing about how to choose a whiskey, get some advice from a professional, such as in an independent off-licence or a specialist retailer, to ensure you choose wisely.
Not surprisingly, she doesn't know the first thing about running a cattle ranch, so reluctantly joins forces with a rugged drover (Hugh Jackman).
All I see are three parties whose members vie with each other to be seen as ordinary folks when clearly they are anything but and will never know the first thing about working class hardship.
Up until recently Brett Ratner did not know the first thing about Bollywood movies, but that did not stop the US director being snapped up to helm one.
Before I hit a ball on Saturday afternoon I admitted I didn't know the first thing about my opponent.
Okay, maybe it's not as bad as that, but if you don't know the first thing about horticulture, you can end up digging yourself into a much deeper hole than the one you started with.