To awaken with a boner so hard a cat couldn't scratch it , otherwise known as to sleep in a tent, or to have a dawn horn.

One who has a mania for music.

An erection caused by testosterone levels being high in the body during the early hours of the morning.

When you wake up with morning wood, put it in your girlfriends ass and yell "the south will rise again!"

an event where a person, hopefully male, awakes with a full erection.

Waking up with a hard on

The seeds of several varieties of Morning Glory (Ipomoea violacea) contain a naturally occurring tryptamine called Lysergic Acid Amide (LSA), which is closely related to LSD. Seeds are taken orally, and can be eaten whole or the active alkaloids can be extracted.

The most common active varieties of seeds are Heavenly Blue, Pearly Gates, and Flying Saucers. Like LSD, LSA acts as a "psychedelic" or "hallucinogen" which can have strong mental effects.