1. A male person who seems like a strong assertive man on the outside, but closer inspection reveals that he is, in fact, metaphorically dickless and balless, like a male Barbie doll, which is anatomically incorrect; 2. A gutless, spineless man
plural: Mattel men
Not to be confused with a man being called a KEN DOLL, which is synonymous with PRETTY BOY or MIMBO
I thought David had balls, but when I got to know him I realized he was a Mattel man.