verbum sap [ˈvɜr bəm ˈsæp] int.
1.) A phrase used in place of making a full statement or explanation, implying that an intelligent person may easily infer what is left unsaid, or understand the reasons for reticence. Also frequently further abbreviated to verb sap (O.E.D. 2nd Ed.).
Etymology: Abbreviation of Latin verbum sapienti sat est, "a word is sufficient for a wise person." The proverb echoes a line from Plautus's Persa: Dictum sapienti sat est, "A sentence is enough for a sensible man."
"(Mem., under what circumstances would I not avoid the pit of hell?) Omnia Romœ venalia sunt. Hell has its price! verb. sap. If there be anything behind this instinct it will be valuable to trace it afterwards accurately, so I had better commence to do so, therefore" (Dracula, Abraham Stoker, 1897).