Short for John Wayne Pain, the feeling one gets after having sex
"I had sex with Andy last night and now I have JWP"
"So I saw you went home with Dave. JWP?"
Short for John Wayne Pain - The vague feeling a girl gets the day after having sex that is an all day reminder of yesterdays events.
Can be used by girls as code for telling friends what they did with their evening
Oh man, Steve and I had sex last night and today I have the JWP