manum inicere: 2. In a jurid. sense, to seize, take possession of, as one's property, without a previous judicial decision (which was permitted, e. g. to a master on meeting with his runaway slave; v. injectio)
Found this in that 12 tables sentence "si calvitur pedemve struit, manum endo iacito"
sunt enim Aegyptii, ut satis nosti, <in>venti ventosi, furibundi, iactantes, iniuriosi atque adeo vani, liberi, novarum rerum usque ad cantilenas publicas cupientes, versificatores, epigrammatarii, mathematici, haruspices, medici.
I am not sure, but my first interpretation of the above was "to such a point that public songs are made about it", i.e. "famously", "proverbially", or so. I found nothing to either confirm or disprove this.
Manum non vertere: "not to turn a hand", that is, "not to do anything, not to make the slightest effort", but also, in the Apuleius passage where I read it, "not to care" (with an indirect question): Sed ego, quid de me Mezentius sentiat, manum non uorterim.
I don't know if this has been posted already, but nihil moror (aliquam rem): I don't care about (something). It's from the judicial phrase nihil morari aliquem meaning "to dismiss (someone)". nihil moror can also take an acc+inf or just an infinitive.