What is Contra Vadium Et Plegium?

Legal Definition
In old English law. Against gage and pledge. Bract fol. 15b. Contra legem facit qui id facit quod lex prohibit; in fraudem vero qui, salvis verbis legis, sententiam ejus circumvenit. He does contrary to the law who does what the law prohibits; he acts in fraud of the law who, the letter of the law being inviolate, uses the law contrary to its intention. Dig. 1, 8, 29. Contra negantem principia non est dispntandum. There ls no dlsputing against one who denies first principles. Co.. Litt. 343. Contra non valentem agere nulla currit praescriptio. No prescription runs against a person unable to bring an action. Broom, Max. 903. Contra veritatem lex nunquam aliquld permittit. The law never suffers anything contrary to truth. 2 Inst 252.
-- Black's Law Dictionary