swollen or becoming swollen, especially as a response to sexual arousal ;)

The abstruse medical terminology for state of having a hard-on or a boner.

The process of erection in a man, whereby his penis gets stiffer and larger, and sometimes points away from the body at an angle.

Adjective form: "tumescent."

After sexual outlet, the reverse process is called "detumescence" (see listing).

.

A fancy scientific word describing an erection.

Chronic arousal without sexual fulfillment, to the point where one feels irritable, cranky, and not at all sexual or horny. A state of being unaware or unwilling to admit that a good dose of healthy gratifying sex would have one feel so much better.

(V) The condition or state whereby his body part resembles the eggplant emoji. Eggplant emoji when used as an a description ... translated into professorial English.

As close to erect as a penis can possibly get without standing up or sticking out. The state of full hanging engorgement.
The optimum conditions for a soft core full frontal Playgirl photo shoot.
Deceiving because one assumes that if it's still hanging down it's gonna be bigger standing up when in fact that's all there is.