_Slang Expressions._--It would be curious to investigate farther how some odd forms of expression of this kind have crept into, if not the English language, at least into every-day parlance; and by _what classes of men_ they have been introduced. I do not of course mean the vile _argot_, or St. Giles' {618} Greek, prevalent among housebreakers and pick-pockets; though a great deal of that is traceable to the Rommany or gipsy language, and other sufficiently odd sources: but I allude more particularly to phrases used by even educated men--such as "a regular mull," "bosh," "just the cheese," &c. The first has already been proved an importation from our Anglo-Indian friends in the pages of "N. & Q."; and I have been informed that the other two are also exotics from the land of the Qui-Hies. _Bosh_, used by us in the sense of "nonsense," "rubbish," is a Persian word, meaning "dirt" and _cheese_, a corruption of a Hindostani word denoting "thing:" which is exactly the sense of the expression I have quoted. "Just the cheese," "quite the cheese," _i. e._ just the thing I require, quite _comme il faut_, &c. Probably some of your correspondents could furnish other examples. E. S. TAYLOR. "_Quem Deus vult perdere._"--In Croker's _Johnson_, vol. v. p. 60., the phrase, "Quem Deus vult perdere, prius dementat," is stated to be from a Greek _iambic_ of Euripides: "[Greek: Hon theos thelei apolesai prot' apophrenai]." This statement is made first by Mr. John Pitts, late Rector of Great Brickhill, Bucks[1], to Mr. Richard How of Aspley, Beds, and is taken for granted successively by Boswell, Malone, and Croker. But no such Greek is, in fact, to be found in Euripides; the words conveying a like sentiment are,-- "[Greek: Hotan de Daimon andri porsunei kaka], [Greek: Ton noun eblapse proton]." The cause of this classical blunder of so many eminent annotators is, that these words are not to be found in the usual college and school editions of Euripides. The edition from which the above correct extract is made is in ten volumes, published at Padua in 1743-53, with an Italian translation in verse by P. Carmeli, and is to be found in vol. x. p. 268. as the 436-7th verses of the _Tragedie incerte_, the meaning of which he thus gives in prose "Quando vogliono gli Dei far perire alcuno, gli toglie la mente." T.J. BUCKTON. Lichfield. P.S.--In Croker's _Johnson_, vol. iv. p. 170., the phrase "_Omnia_ mea mecum porto" is incorrectly quoted from _Val. Max._ vii. 2., instead of "_Bona_ mea mecum porto." [Footnote 1: This gentleman is wrong in saying _demento_ is of no authority, as it is found in Lactantius. (See Facciolati.)]