verbum sap
Definition - 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. (OED)

Example -
"Mark that horse and when he runs next plump on him with all your available capital. Verb Sap."
(OED: 1889, E. Dowson Letter)

Etymology -
The term was coined by shortening the Latin verbum sapienti sat est, a word is sufficient to a wise person.

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