Engorged

[Sarah]

Filled to excess with blood or other liquid; congested.

[Tanya Shivari]

[Erect] to the point of your penis feeling like it’s going to [explode]. It’s a [sign] of youthfulness.

[Dorothey Allen]

If a part of the body is engorged, it has become swollen or filled with a liquid, especially blood.