plunk /plʌŋk/ BrE AmE 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 SYN 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 SYN 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.