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plunk (someone, something, or oneself) down
To set, throw, drop, or place someone, something, or oneself heavily down to a lower level. He plunked the bag on the table and went into his room without a word. Please don't just plunk yourself down in front of the television all afternoon—I want you to play outside for at least two hours today! He threw his toy across the room, so I carried him upstairs kicking and screaming and plunked him down in bed for the night.
To fall or set down heavily down to a lower level. He came into the room and plunked down onto the sofa, too tired to speak. Please don't just plunk down in front of the television all afternoon—I want you to play outside for at least two hours today!
plunk (oneself) down
to sit or fall down hard. Nancy pulled up a chair and plunked herself down. She pulled the chair up and plunked down. She plunked herself down in the middle of the kids and began to sing.
plunk someone or something down
to place, drop, or plop someone or something down hard. He picked her up and plunked her down in a chair and began to shout at her. Sally plunked down the book in anger.
Throw or place or drop heavily, as in He plunked down the money and walked out, or It was hot work, so after an hour we plunked ourselves down in the shade. [Late 1800s]