1. Verb:
* To fall or drop with a soft, dull sound. This is the most common meaning of "plop." For example, "The stone plopped into the water."
* To place something down with a soft sound. For example, "She plopped down on the couch."
2. Noun:
* A soft, dull sound made by something falling or being dropped. For example, "I heard a plop as the ice cube hit the water."
3. Interjection:
* Used to imitate the sound of something falling or being dropped. For example, "Plop! There goes the last cookie."
4. Slang:
* A term for a silly or foolish person. This usage is less common and often considered derogatory.
The meaning of "plop" is often clear from the context of the sentence.