plunk (yourself) down
From Longman Dictionary of Contemporary Englishplunk (yourself) downplunk (yourself) down informalto sit down suddenly or heavily and then relax SYN plonk British English Why don’t you plunk yourself down with a good book? → plunkExamples from the Corpusplunk (yourself) down• I plunk down a dollar and confront my deepest fears.• Americans love to plunk themselves down in front of the TV.• Marketers usually plunk down the equivalent of $ 40,000 or so in cash, goods or services for placement.• The beverage giant wants you to plunk down your money and decide for yourself.