A fork of Rural Dictionary
1. when you have just dumped or been dumped, and you are feeling majorly low, and all you wanna do is sit around and cry and eat chocolates and strangle the teddy bear he gave you...
2. if you've just been parted from something you majorly love, and you're really down about it.
"dude...i'm suffering from PBUS"
"damn it! i can't believe i'm not the play is over, i'm having theatre PBUS!"