This was used as an insult in the HBO hit series Entourage where character Ari Gold (played by Jeremy Piven) told character "E" that he was a cunt muscle for waking his family up in the early morning.
Ari: Noo but u did wake my wife and kids dick head, Vinnie better be sitting in prison with a DUI or something is he?
Ari: Then what the fuck do u want Cunt Muscle!?
In situational terms one may be "cunt-muscled".