all show and no go adjective used for describing someone who cannot back appearances with action US,2000
“I think you’re all show, no go,” she said, and gave him a firm shove. — Willard Scott MacDonald, Moose, p. 158, 1978
He’s all show and no go. When he tried to act tough with us, no matter what happened, Hunter Thompson got scared. — Ralph “Sonny” Barger, Hell’sAngel, p. 125, 2000