GI Joe /ˌdʒiː aɪ ˈdʒəʊ/ BrE AmE
1 . American English informal a male US soldier, especially during World War II
2 . trademark a type of ↑ doll (=a child's toy like a small person) dressed as a male US soldier and played with usually by boys in the US. A similar doll in the UK is called ↑ Action Man .