Ripskin Boner
When one achieves an erection which manifests such intensity that it ostensibly appears to rip through the outer skin of the hard penis.
1. After drunkenly making out with a transvestite hooker, little Johnny had a ripskin boner.

2. Warning label for erectile dysfunction pills: If erection is achieved and lasts for more than 4 hours, you may have a ripskin boner requiring immediate medical attention.