When someone (the attacker) hijacks Spotify running on your computer, or manages to log-in to your account remotely and proceeds to play all manner of dreadfully embarrassing songs. Obviously the goal is to gain placement in Spotify's social feeds, so that friends of the victim will see that said victim is currently listening to the type of music that will have their reputation in tatters.
The word originates from the amalgamation of "Spotify" + "rape". Similar to what Frape is to Facebook.
Attacker: "Look, he's left Spotify running on his computer. Let's play songs by Samantha Fox and other embarrassing '80s wannabe artists!"
Friend's of victim: "OMG. Friend/Victim is listening to Samantha Fox and other embarrassing '80s wannabe artists!! Where's the bloody defriend button hiding these days?"