When you haven't been to a rave in bare long so that you literally have physical cravings to go to a rave. The thought of taking loads of class As and skanking to bassy music makes you incredibly excited so much that you don't know how much longer you can go without going to a rave.
Sam: Mate, I've not been to a rave in almost a month, I've got the shittiest rave cravings
Alex: Peak mate, I'll try not to play any dirty tracks so as to not trigger your rave cravings