When a person with sever flatulence sits on upholstered furniture and the vapor of their farts have permeated the fabric to the extreme that no amount of cleansing or odor remover can remove the smell.
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."
The physical and mental state sometimes aquired by someone who consistently smokes, or used to smoke, a lot of weed. Typically characterized by the feeling and appearance of being stoned even when one is still technically sober.
See: Tommy Chong. The guy who works at your local smoke shop. Any stoner with a seemingly permanent smile and lazy eyes.
"Man, my dad hasn't smoked in years, but you can tell he's permastoned from his days on the commune".
One of those people in their late 20s or early 30s, or even mid to late 30s who has never held any kind of full time job, barely has a degree worth mentioning (usually in something assinine like liberal arts or women's native's lesbian's studies) and is still trying to get juust a few more courses before they can start their PHD..... and eventually retire at 75 with several million in student loan debts and never having worked a day in their life (aside from mandatory TA positions).
All of the sophomores had a class with Johnny, a 35 year old permastudent who has been stretching his final year of university over the past decade.....