flabbily r in a flabby manner the old man's muscles were sagging flabbily Usage(s) This time the author of Look Back in Anger has no brilliantly disgruntled intellectual for a hero, but a flabbily disintegrating vaudevillian. Such macho rhetoric often goes flabbily vague at the critical moment: Does "what has to be done" mean overthrowing Castro? Kristol does not say.