The act of intentionally entering random numbers, letters, or symbols into one's calculator to take up space or make the calculator run out of memory. Works best with graphing calculators, as they have a big screen and letters. Words commonly used to rape calculators include "lol", "roflcopter", and "roflmao".
Paul: *Presses seemingly random numbers into a graphing calculator*
Patricia: Is he raping your calculator?
Clare: *reads calculator: "lolololololololololroflmaololomgwtfbbqlololllerskatelolololroflcopterlolol..."*
Clare: Unfortunately... This is the worst case of calculator rape yet.