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"feeding the machine" is when you put money in a vending machine or arcade game or any other coin operated device and you get "ripped off".
Jaime:"Awww, dude, this pinball machine just ate my last quarter."
Pete:"Looks like you just feed the machine, man."
by pete-tastic July 03, 2007
The act of putting calories in your body, usaully through food or drink, after you get done working out.
After a heavy day at the gym jason is going to feed the machine.
by ruggermatt36 June 24, 2011