grumpy dick 

Having or getting an erection while taking shit.

Dude, I had to rub one out this morning after getting a grumpy dick.

grumpy dick by Toilet erection May 28, 2017

Grampy Dick 

Also known as impotence or erectile disfunction, is a chronic condition that occurs when a man is unable to get or maintain an erection firm enough for sexual intercourse.

She said nothing happened between y'all.. I guess all that coke you keep snortin' gave you grampy dick.

Grampy Dick by G. Twilight March 20, 2024