slang An involuntary erection that a man achieves during sleep and wakes up with in the morning. I rolled over to snuggle my boyfriend, only to bump off of his morning wood.I hate waking up with both a morning wood and an urgent need to pee!See also: morning, wood
morning wood
morning wood
A popular slang term for an early morning erection, which is said to more commonly occur in boys during puberty.