2017年11月16日 · The first use of 'spliff' I could find was in the 27 April 1855 Lincolnshire Chronicle [paywall] where, in its singularity, it might well have been a mis- or deliberate re-spelling of 'spiff' (1862, OED), the shortened form of 'spiffy' ("smart, spruce", 1853, OED, in Letters of Dante Gabriel Rossetti; 'spiffy' with a broader sense of "decorated, spectacular" appears …

This unsubstantiated source suggests that spliff is a portmanteau word derived from combining the word split with the word spiff: (From split <divided> + spiff <well-dresssed or good>) A quality cigarette rolled with both tobacco and marajuana, initially popular on Europe's Iberian Peninsula.

2013年11月2日 · OED says: doobie: a marijuana cigarette Origin unknown. A relationship with dobby has been suggested. dobby/dobbie: A silly old man, a dotard, a booby. Dialectal. First citations: ...

Something like: dingbat, thingamabob or thingy . From. 1925 E. FRASER & J. GIBBONS Soldier & Sailor Words 215 Oojah (also Ooja-ka-pivi), a substitute expression for anything the name of which a speaker cannot momentarily think of, e.g. ‘Pass me that h-m, h-m, oojah-ka-pivi, will you?’ 1931 J. VAN DRUTEN London Wall II. ii. 73 There's a whole lot in the Oojah Capivvy now. …

I've looked on Google for several minutes, but I can't find a plausible reason, nor any immediately useful things to follow up. (I understand "Don't bogart that joint" to mean "Pass the [cannabis]...

2013年12月19日 · The slang term minge in the sense of quim dates from the beginning of the 20th century. However, neither the OED nor Etymonline has any idea where it came from. Here are two of the OED’s citations:

2016年5月8日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

2016年1月5日 · Dope is a rather new slang word that is used to define someone or something excellent, great, impressive. OED says that it is originally in African-American usage and chiefly among rap musicians and

Another word of mysterious origins of jism, in the sense of spunk. The OED mentions it is sometimes spelled jizz, and may even be the precursor word to jazz. But neither the OED nor Etymonline

Recent slang dictionaries on the origin of 'wank' and 'wanker' I note at the outset that every recent slang dictionary ultimately concedes that "origin unknown [or obscure]" remains the final word on these terms.