Plunk (verb)

1. To drop or place heavily or abruptly.
2. To put or deposit something suddenly or without ceremony.
3. To play a musical instrument, especially a stringed instrument, by plucking the strings.

Origin:

Of uncertain origin, perhaps imitative of a thudding or plopping sound.

Examples:

1. She plunked her heavy backpack onto the table.
2. He plunked down on the couch, exhausted from a long day.
3. The musician plunked out a tune on his banjo.
4. She plunked the coins into the vending machine.
5. The chef plunked the ingredients into the pot and stirred the mixture.