Pump Iron 

To lift weights; to engage in weight or strength training. To work out.

Hot chick at the gym: "OMG! You are so buff!!"
Buff Guy: "Ya babe, I pump iron."

Pump Iron by Gavi120 June 10, 2010

pump some iron 

To workout your muscles.

C'mon let's go to the gym and 'pump some iron'!

pump some iron by CRAV February 14, 2014

pump-an-iron

Pour and/or drink an Iron City Beer

I'll meet yinz dahn da beer garden ta pump-an-iron.

pump-an-iron by D-Web December 28, 2006