plunk /plʌŋk/ verb [transitive always + adverb/preposition] American English informal
[Date: 1800-1900; Origin: From the sound]

1. (also plunk something down) to put or place something somewhere, especially in a noisy, sudden, or careless way Synonym : plonk British English
plunk something in/on etc something
plans to plunk a theme park on the island

2. plunk (yourself) down to sit down suddenly or heavily and then relax Synonym : plonk British English:
Why don’t you plunk yourself down with a good book?
plunk something ↔ down phrasal verb
to spend an amount of money on something:
She plunked down $250 for a silver necklace.

[TahlilGaran] Dictionary of Contemporary English ▲