rattling
rat-tling
adjective
Used informally to emphasise that something is very good, fast, or significant.
"That was a rattling good story."
verb
Making a series of short, sharp, knocking sounds, often due to movement.
"The old train was rattling along."
Thesaurus
Synonyms: rale, rattle, brisk, spanking, energetic, alert, merry, zippy, snappy, lively, very, real