If you hem and haw long enough, someone else will do it first.
To mumble and procrastinate in one's speech, especially with a reply to a hard question or with voicing a decision on a topical matter; to evade a question, giving vague answers; to equivocate or temporize.
The man at the Chief Office hemmed and hawed. 'We make it a rule,' he explained, 'to give no information concerning our clients.' 'But in this case,' I urged, 'it is the client who requests you to give the information concerning himself.' Again he hemmed and hawed.