Ear rape is something loud or obnoxious directly into your ears. It could be something like a played with audio or even someone just yelling into a microphone. One way we have all experienced ear rape is by someone really bad at singing at your school talent show, and it's so bad that the microphone makes that really obnoxious screech that everyone hates and all the kids in your middle school would complain about, yeah that noise.
JOE: Huh there a lot of people here I should pop in some headphones....
*WATCHES A PEWDIEPIE VIDEO*: SQREEEEEEEEEEEEEEEEEEEEEEEEEEE
JOE: A SHIT MY EARS. THIS IS THE DEFINITION OF EAR RAPE!