similar to a stunt double, the cunt is the replica of a cunt but of lesserquality and therefore must be the double.
"bitch you was aight, but you was kinda a cuntdouble"- Phil West
"yo, that bitch was a mothafuckin cuntdouble, yada" - Charlie Yedor
"you fuckin cuntdouble" - Phil West
When someone is being a cunt and should definitely give their head a wobble. To be used when cunt is not a strongenough word and no other will suffice.