zoomies in English dictionary zoomies Meanings and definitions of "zoomies" noun (US military slang) Nontechnical units of radiation, such as are present in a compartment containing or near nuclear weapons or a nuclear reactor, or are picked up on a dosimeter. noun (slang) A period of frenzied running in a pet cat or dog. more Grammar and declension of zoomies zoomies pl (plural only) more Sample sentences with "zoomies" Declension Stem Try again Available translations Cornish Authors