One who chirks; something that makes a chirking sound, or someone characteristically cheerful and lively.
From 'chirk' plus the agent noun suffix '-er,' following the standard English pattern of creating someone or something that performs an action (like singer, walker, talker).
Agent nouns with '-er' are one of English's most productive word-building tools—you can add '-er' to almost any verb and instantly create a noun for someone who does that thing, which is why slang and new professions constantly spawn words like 'blogger' or 'influencer.'
Complete word intelligence in one call. Free tier — 50 lookups/day.