‘happy-clappy’: a member of a Christian group whose worship is marked by enthusiastic participation; composed of ‘happy’ and of the noun ‘clap’ suffixed with ‘-y’—with allusion to the cheerful singing and hand-clapping regarded as typical of charismatic religious services
In British slang, the noun ‘piss-up’ denotes ‘a heavy drinking bout’, and the phrase ‘couldn’t organise a piss-up in a brewery’ and variants mean ‘is’, or ‘are’, or ‘am’, ‘incapable of organising the simplest event, task, etc.’—phrase first recorded in 1980.
from army use on the Western Front during World War One: ‘cootie’, ‘body louse’, ‘cooty’, ‘infested with lice’, ‘coot’, ‘louse’, probably ultimately refer to the aquatic bird called ‘coot’, reputed to be lice-infested
early 20th century—‘Zeppelins in a cloud’ and variants mean ‘sausage and mash’—during World War One, the phrase was used as a manner of disregarding the fear caused by the bombing raids carried out by Zeppelin airships
UK, early 19th century—an imaginary street where people in difficulties, now especially financial ones, are supposed to reside—urban counterpart of ‘Dicky’s meadow’
UK, 1972—‘XXXX’: a euphemistic substitute for a four-letter swear word, usually ‘fuck’—it did not originally refer to the Australian lager Castlemaine XXXX
With words denoting some specified deficiency in a desirable or standard quantity of something, ‘short of a ——’ means ‘mentally deficient’, ‘slightly crazy’.
‘the rough end of the pineapple’: harsh or unfair treatment—said to be an Australian phrase, but may have originated in the USA in the mid-20th century