hesitate, waver, waffle — pause or hold back in uncertainty or unwillingness
"Authorities hesitate to quote exact figures"
—
Read more on WordNet
Dawn's room
Dawn hands Tommy the bottle and he takes it hesitantly
Dawn (Off-screen):Watch and learn...
Tommy pops off the cap and tosses it away slowly until Dawn screams at him
Dawn (yelling):Will you quit hesitating and start drinking?!
Tommy (yelling):Gah!!!
Tommy stares at Dawn and then begins to gulp down the joooce