To give money, to pay.
Башляешь ментам 2500 р за разрешение на ружье и 5500 р. за сайгу (единовременно).
You fork out 2,500 roubles to the fuzz for the weapon licence and 5,500 roubles for the hunting rifle Sayga (simultaneously).
(Cardinal @ drom.ru, 03/2003)