bubble head
n.— «The 2d Class Diver badge “bubble head” was authorized for wear in 1974. The recipients of both parachutist and diver insignia are considered “dual-qualified” (or “dual-cool”) full-fledged “Reconnaissance Marines.”» —by Charles D. Melson Marine Recon 1940-90 Sept. 12, 1994. (source: Double-Tongued Dictionary)
Further reading
Sometimes it’s a challenge to give a book a chance: How many pages should you read before deciding it’s not worth your time? There’s a new formula to help with that decision — and it’s all based on your age. • Have you ever...
Manuel in Fort Worth, Texas, wonders about a phrase he’s heard from his dad and brothers: Cut me a husk meaning “Give me a break.” The term evolved from slang used by U.S. Marines serving in Vietnam, and HUS, the configuration for...