know (one's) onions

(redirected from knows his onions)

know (one's) onions

To be very knowledgeable or skilled in some area. Primarily heard in UK, Australia. I think Nicole is our best candidate for the job—when it comes to corporate accounting, she really knows her onions.
See also: know, onion

know your onions

BRITISH, OLD-FASHIONED
If you know your onions, you know a lot about a particular subject. She really knows her onions in the historical field. Note: This may derive from the rhyming slang `onion rings', meaning `things'.
See also: know, onion

know your onions

be fully knowledgeable about something. informal
Onions is perhaps short for rhyming slang onion rings , meaning ‘things’. The phrase dates from the 1920s.
See also: know, onion
References in periodicals archive ?
There were mutters of assent and groans of exasperation before the secretary, who knows his onions, correctly pointed out that it's not a club rule but a law.
Mike Abdul indeed is a singer that knows his onions and him along with his group mates, Gbenga Oyebola, Odunayo Ojo-Onasanya and Pat Uwaje-King, performed '30 billion halleluyah' at the Experience 2017 concert that had the theme, Christ Our King.
Chris has worked in food import and export for years and certainly knows his onions.
A new pair of eyes is always helpful to have in any situation and when they come attached to someone who really knows his onions, all the better.
They're the 1-in-7 Don't Knows who don't know if their brain thinks that a man who has been leader of the opposition for four years knows his onions.
But will this be enough to win the approval of judge, Royal gardener Jim Buttress - a man who really knows his onions - and his radishes?
He knows his onions and wouldn't be entering Hillstar just to make up the numbers.
STAR Britain's Mark Cavendish after winningthe fourth stage of this year's Tour de France FUN From top, Grayson King, Isabella Maddison and Karah Jackson KNOWS HIS ONIONS Adam Burnside, 4, gets into the spirit of the French theme
But whatever the 'it' is, Wood has it in spades, but he knows his onions too - he isn't a mere figurehead when it comes to the various series he's presented over the years.
KEEN Netherton gardener Tony Goode knows his onions when it comes to raising money for charity.
HE KNOWS his onions in the business world, but Dragons' Den host Evan Davis doesn't look much of a security guard.
Eight-year-old Harry North of East Loftus has grown a 4lb 4oz onion (Harry's Only Eight But Really Knows His Onions, 07.
But the success he has had with this horse and his half-brother, Jacks Estate, proves he undoubtedly knows his onions.
MEDWYN Williams is a man who knows his onions and in the past has even produced yellow carrots.
About time too and if Bertie knows his onions, he'll give the green light.