know the first thing about

not know the first thing about something

to not know anything about a particular subject I don't know why you're asking Rob, he doesn't know the first thing about classical music.
See also: first, know, thing
References in periodicals archive ?
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.
As the Father of Communications and Media Studies, Marshall McLuhan, famously said, "Anyone who tries to make a distinction between education and entertainment doesn't know the first thing about either.
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.
was and she didn't know the first thing about a driver or a putter but now she has one of the most envied swings in the women's golf world.
I may have bumped into him at a World Cup somewhere, but, if I did, he obviously didn't make an impression on me because I don't know the first thing about him.
Who put that crackpot in charge of welfare reform, when he doesn't know the first thing about poverty?
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.
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.
I don't know the first thing about cars but I can live in one no problem.
In his defence the man said he didn't know the first thing about raising ants