brass up

verb2

1. •
   (slang) To pay a debt or hand over money.

   • "What did he soak him? Five quid?" "Yes, sir." "And Gussie brassed up and was free?" — 1949
2. •
   (slang) To shell.

   • The next time I met RSM Simpson was when we were together being 'brassed up' by enemy artillery and mortar […] — 1982