(adjective)
(informal, now dated) very good, splendid, or extraordinary;
e.g. The kids had a rattling time at the beach.
(verb)
making a rapid series of short, sharp sounds, similar to knocking, especially by shaking something so that parts of it repeatedly strike a hard surface, or causing something to make such a sound;
e.g. The car was rattling louder, suggesting that something had broken. She was rattling the box of hard candies.
(verb)
moving with a series of short, sharp sounds, usually due to something shaking and repeatedly knocking against a hard surface;
e.g. We heard his old car rattling up the street towards the house.
(verb)
causing someone to feel uncomfortable in some way by making them irritated, nervous, or worried;
e.g. His constant questions were rattling them and making them forget what they were supposed to say.