snow-white-shadow:(From Animaniacs - This Pun For Hire)FOR THOSE WHO DON’T KNOW: Heat/heater is also
snow-white-shadow:(From Animaniacs - This Pun For Hire)FOR THOSE WHO DON’T KNOW: Heat/heater is also slang for “gun" and to pack has an informal meaning “to carry, deliver, or have available for action”. So “packing heat/heater” means that you are carrying a gun (and are ready to use it). -- source link