This is when a bit before you wake up in the morning, you have a sexy wet dream. And when you wake up, you have an extreme urge to masturbate, and you usually do so. For the rest of the day you tend to have a hyper libido.
"Sorry I'm late for school today. I woke up with morning horny and missed the bus."
von Trevdagger's Ticklemonster 26. November 2013