mad for it

adjective1

1. •
   (UK, informal) Exceedingly eager, or having a keen desire or appetite for something.

   • Glenereegan is to be sold to the highest bidder to-day.[…]I'm tould - It's Pether Byrne that dhrives Bianconi's car that tould me - that a smalpeen of a Dublin attorney is mad for it. — 1883