One that chackles; something that makes chacking or sputtering sounds.
From 'chackle' (verb) with the agent suffix '-er,' following the same pattern as 'chacker.' Both forms represent the productiveness of English word-formation with agent nouns.
English creates new words so easily by adding suffixes that we're not always aware we're doing it—'chackler' might never appear in a dictionary but any English speaker would understand it immediately!
Complete word intelligence in one call. Free tier — 50 lookups/day.