Grudgina
Getting a piece of ass in order to get back at someone. Typically, a close friend or relative works best.
John was so upset that his wife left him. So, he used her sister as a piece of grudgina.
That bitch really pissed me off, so I used her best friend for some hot grudgina.
That bitch really pissed me off, so I used her best friend for some hot grudgina.