frogman noun3 •A Open Water Certified Diver, especially one in a diving suit (as opposed to one not in scuba gear). •A military diver, e.g. a US Navy SEAL. •A member of a naval special operations unit.He [John Wolfram] joined the navy upon graduating from high school, became [sic] an Underwater Demolition Team (UDT) frogman, and served in Vietnam. — 2020 formsfrogmen
