ridged penis

A penis with horizontal grooves or protrusions along the length of the penis, typically along the underside of the penis, and differentiated from ribbed_penis by the appearance of a "sharp" or hard edge.

Not to be confused with

nubbed_penis - Bearing small lumps or protuberances.
penile_spines - Having small hooked barbs like a feline penis or a row of curved protrusions along the length.
ribbed_penis - Possessing a shape similar to ridged penis, but with smoother grooves along its length that resemble a set of ribs.
spiked_penis - Being differentiated from a barbed penis by sharp-looking spikes that are not curved.
spikes
spines