not know the first thing about (someone or something)

(redirected from don't know the first thing about)
Also found in: Dictionary, Thesaurus, Legal.

not know the first thing about (someone or something)

To not know anything about someone or 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. Why do you presume to know what I would or wouldn't do? You don't know the first thing about me!
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 periodicals archive ?
What is the point of people fighting for equality when our own community are happy to perpetuate lazy stereotypes of gay people as materialistic, consumer-obsessed and enamoured of awful, naff pop acts who don't know the first thing about being gay?
Although many people in the North East take vitamins, eat organic foods and drink pro-biotic yoghurts in an attempt to feel good, they often don't know the first thing about looking after their minds.
If you're bad at book-keeping and accounts, or don't know the first thing about customer service or after-sales care, you should embark on a relevant training course.
I don't know the first thing about how it works,'' said Palmer, who serves as president of Seniors for Action, a nonpartisan group studying political hot topics.
Many of the people who now pour scorn on my father and the way the war was fought don't know the first thing about it.
His classes include students of all levels--in one of his classes, he is supposed to be teaching 11th graders World History at the same time he is teaching 10th graders American History--and some of them are recent immigrants who don't know the first thing about either topic.
Heck, everybody knows Democrats don't know the first thing about winning Senate campaigns.
Most of the knee-jerk reactions came from people who don't know the first thing about me, my illness or what it involves.
While sympathetic to those charged with running the bank, he said, 'They don't know the first thing about a biotech business - as much as I don't know the first thing about a steel business.
We printed a selection but the one that tickled me most was: "Murray foot, I think you're a total f***y and don't know the first thing about music.
For the 99 percent of Hollywood Park horseplayers who don't know the first thing about Patrick Byrne, trainer of three Breeders' Cup favorites, here it is:
Most people watching the Ireland game don't know the first thing about the sport.
It's immature of people to say he's a Rangers supporter when they don't know the first thing about him.
People who don't know the first thing about cheating, lying or any of the vices people considered mentally competent seem to learn all too well.
Full browser ?