kerplunk

Definitions

1. A sound of someone or something falling and landing heavily.
   informal
2. A disappointment which comes as a surprise.
   US, dated, figuratively, slang

Equivalents

Examples

“If my life were a Saturday-morning cartoon, you would have⟳ heard a loud kerplunk as my stomach dropped. My poor starving stomach. It was under such stress⟳ already, and now this.”

CEFR level