Definition & Meaning of "zipperhead"in English

What does "zipperhead" mean in Canadian military slang?

The structure combines "zipper" (referring to the zipper on a tank crewman's coverall or the tracks of an armoured vehicle) with "head," forming a nickname for a specific soldier. It is used in Canada, within the Canadian Forces, to refer to a soldier in the Royal Canadian Armoured Corps or an Armoured Crewman, often as a term of pride among members but sometimes as a teasing or derogatory term from other branches. People typically say "He's a zipperhead" or "The zipperheads are doing maneuvers."