Here are some of my favorite words and phrases that are particular (peculiar) to British English. The selection is based on the Cambridge Idioms Dictionary, 2nd edition, 2006. Where possible, I tried to define the phrases listed here by giving an American equivalent.
As for the Cambridge Idioms Dictionary, to me it posed more questions than it answered. Take get on your bike, for instance. This dictionary says it means "go out and look for work," which apparently, as I learned online, is a meaning that was established after British politician Norman Tebbitt used the phrase in that sense in a certain speech he gave in the eighties. 
It turns out that, in fact, in British English on your bike is, first and foremost, simply a dismissive phrase, which children might hear often. It isn't always about urging someone to look for work.
Then there were other phrases, like to get no chance out of someone, and to have had your chips, for which the definitions given differed from how native speakers use these phrases online. So, in these two cases, I give here definitions and explanations which I've seen confirmed by British English speakers online. If you are one and you use these phrases differently, please let me know in comments.
So here come some of my favorite British English words and phrases.
argy-bargy – loud dispute or argument. Rhyming jingle based on “argue”
to be out of the ark – to be ancient in the sense of very old-fashioned
can’t be arsed -- can’t be bothered, which is also British.
to be fed up to the back teeth – to be fed to the teeth in AmE, or, more commonly, fed to the gills, or fed up to here (accompanied by gesture)
to be in a bad way (British and Australian) – to be in a bad place; can be used of both people and things (businesses, countries, etc.). Here “way” means condition or state.
to bat for the other side/team – to play for the other side/team, in the sense of being gay
to be off-beam (British and Australian) – to be wrong
to be like a bear with a sore head – to be grumpy and rude to people
beat somebody hollow (British and Australian) – beat the crap out of someone in the sense of defeating them thoroughly
the bee’s knees – excellent; slang taken up by Americans in the 1920s, which is also when they started using “the cat’s pajamas” and other similar expressions
a bit of how’s your father (British and Australian) – sex
bits and bobs – bits and pieces, odds and ends
and Bob’s your uncle! – something like “that’s all; it’s easy;” used to emphasize that you will be successful after following some easy instruction steps. As in, “Sauté the onion and garlic, add the veggies, tomato juice and spices, cover for 10 minutes, and Bob’s your uncle, you’re done!”
bone idle – bone lazy, very lazy
(That’s/There’s a) turn-up for the books – something unexpected. Comes from betting in horse racing. If a race was won by a horse that wasn’t wagered on in the bookmaker’s book, then the latter got to keep all the money.
Why break the habit of a lifetime? (British and Australian) – self-explanatory
bright as a button (British and Australian) – a version (meaning “intelligent”) of the American “cute as a button”
like chalk and cheese – (superficially alike but in fact) totally different
Chance would be a fine thing! – said when you desire something that isn’t likely to happen. As in a response to an invitation.
to get no change out of someone – to get no help from someone
cheap and cheerful (British and Australian) – cheap but of decent quality
cheap and nasty (British and Australian) – cheap and of (very) bad quality
hard/tough cheddar (British and Australian) / stiff cheddar (Australian) – tough luck
cheeseparing – 1. adj. stingy, penny-pinching. 2. n. stinginess
to have had your chips – to be done for
to chop and change – to change again and again what you do or plan to do
off one’s chump / off one’s trolley – out of one's mind (off one’s rocker, off one’s nut -- but these can have certain, specific connotations)
Hope you've enjoyed today's bits and bobs of British English! :)
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MiraFeb 23, 2018
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VeronicaFeb 20, 2018
I am married to a southerner and over 42 years together my northern accent is not as pronounced as other peoples'.
frankbeswickFeb 20, 2018
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Thanks for visiting, adragast!
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