Idiom Insider The origins, properly sourced
idiominsider.com How we source & date Folk etymologies corrected Established 2026
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1900s

First recorded 1900s
pie in the sky
A pleasant prospect or promised reward that is attractive but highly unlikely ever to be realised; wishful thinking dressed up as a plan.
Attested1911
First recorded 1900s
Close but no cigar
Said of an effort or guess that falls just short of success; near enough to deserve recognition, but not good enough to win the prize or be counted correct.
Partly True1929
Sporting
Jump the gun
To start or act before the proper time or before you are allowed to; to do something prematurely or hastily, pre-empting the signal or the right moment.
Attested1921
Sporting
“Throw in the Towel” — the boxing signal that grew out of an older sponge
To give up, concede, or admit defeat.
Attested1913
First recorded 1900s
The Elephant in the Room
An obvious, major problem or awkward truth that everyone present can see but nobody wants to name or discuss.
Attested1959
First recorded 1900s
Cost an Arm and a Leg
To be extremely expensive; to require a painfully large amount of money.
Attested1949
First recorded 1900s
the cat’s pyjamas
An excellent, stylish or thoroughly admirable person or thing; the very best of its kind, worthy of enthusiastic praise.
Unproven1919
First recorded 1900s
the bee’s knees
Something or someone regarded as outstanding, the height of excellence, in a playful, informal register that dates from 1920s slang.
Attested1922
Theatrical
break a leg
An ironic phrase said to performers before they go on stage, wishing them good luck by seeming to wish the opposite.
Unproven1948
First recorded 1900s
to 86 something
To get rid of something, refuse a customer service, cancel a plan, or mark a menu item as no longer available.
Origin Unknown1920