Meaning of rattling

(adj) extraordinarily good or great; used especially as intensifiers; "a fantastic trip to the Orient"; "the film was fantastic!"; "a howling success"; "a marvelous collection of rare books"; "had a rattling conversation about politics"; "a tremendous achievement"

quick and energetic; "a brisk walk in the park"; "a lively gait"; "a merry chase"; "traveling at a rattling rate"; "a snappy pace"; "a spanking breeze"

(adv) used as intensifiers; `real' is sometimes used informally for `really'; `rattling' is informal; "she was very gifted"; "he played very well"; "a really enjoyable evening"; "I'm real sorry about it"; "a rattling good yarn"

(noun) a rapid series of short loud sounds (as might be heard with a stethoscope in some types of respiratory disorders); "the death rattle"