When somebody has acted cuntishely on a frequent basis. Permacunt differs from cunt in that the reputation of said person has become so immensely cuntish that they will forever be deemed a cunt.
-"She is such a cunt, she will permanently be a cunt."
-"Yeah, man, she's a permacunt for sure."
A long lasting smile usually caused by the frivolous feel after a great session of sex. A great partner is required to achieve this higher plane of sexual satisfaction. Accompanies lightheadedness, temporary speech impendiment, being off balance, carelessness, blurred vision, and generalsexual "outbursts"
He walked into the room with her, after five hours they both walked out stumbling with empty eyes and permagrins plastered to their faces.