Frank is a war veteran. He served in the US Army in the Korean War, a fact that he constantly refers to throughout the series, recalling times of survival, which often explain his open displays of masculinity and his socially-conservative values, particularly towards gays, lesbians, hippies, Koreans, and Japanese. He often mutters to himself: "Japanese crap," and refuses any form of oriental cuisine. He refuses to accept or acknowledge anything not within the social norm, to which Marie quotes: "Frank lives in blissful ignorance."
Frank is famous for his output of hilarious one-liners. His two primary catchphrases that were heard through all nine seasons were: "Holy crap" and "Geezaloo."