When a person wakes up with a boner. Common in guys that sleep directly facing the bed.
Riley: Ew Dr. J I don't wanna see your man boner
Dr J: Its just Morning Wood Riley
by RamoonAdoo August 8, 2016
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Waking up with an erection. It's often associated with the need to use the bathroom upon waking up. Scientific term is nocturnal penile tumescence. There is no real scientific proof as to why men wake up with a erection although there are many theories. And by the way "dr. Pascalle" is a fake and an idiot. No such thing as hypervasodilation.

Means the same thing as Morning Glory
It sucks trying to take a piss when you got a morning wood.
by Urban Cock May 12, 2009
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You get out of bed and you have one. Luckily, none of your fam is there to see it so you good.
Bobby was at a friend’s house for a sleepover. In the morning, his friend had morning wood. This was an uncomfortable situation for Bobby.
by Shrekcanneverbereplaced May 23, 2019
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When a guy wakes up to a hard dick after a long night of sex
Lydia : Good morning Chad last night was amazing thanks for letting me sleep in your bed! (wink)
Chad : No problem sis my wife don't mind sleeping on the couch!
Lydia : Mmm! Looks like you got some Morning Wood!
Chad : Yeah I guess I do we should not waste it!
Lydia : Does Chad want a blowjob?
Chad : Uh Yeah DUH!
Lydia : Mmmm! Mmmm! Mmmm! Mmmm!
Chad : Damn Lydia you sure know how to suck! Ahhhh! Ahhhh!
Chad's Mom : Hey Chad time for breakfast OH MY GOD NOT AGAIN!
Chad : Get lost bitch Lydia is taking care of my Morning Wood!
Chad : Mmm! Now time for some sasuage in your ass!
Lydia : Mmm! Breakfast in bed!
Chad : Ahhhhh! Ahhhhh! Ahhhhhh! Ahhhhh!
Lydia : Oink! Oink! Oink! Oink! Snort! Snort! Snort!
Chad's Mom : OH MY GOD! OH MY GOD! (sniff) (sniff)
Chad's Dad : Honey do I hear pig's OH MY GOD NOT AGAIN! (sniff) (sniff)
Steve : Hey guy's check it out ive got Morning Wood! (wink)
Chad's Mom : O Wow it's so BIG!

Chad's Dad : Damn't Honey quit staring at that guy's Wood!
by SlopNChop December 3, 2018
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A song by Nth Degree about having morning wood.
M-O-M-O-R-M-O-R-N-I-N-G-W-O-O-D TO THE Nth DEGREE!!! I love Morning wood!
by Co0k1eM0n5tr805 June 17, 2009
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A morning erection that is naturally caused as the brains enters the REM-deep sleep phase. At this stage, the body's skeletal muscle structure relaxes and causes hypervasodilation in the capillaries of the body, resulting in said erection.
After sleeping so soundly and having a great night's rest, it is no surprise to wake up with an erection.
by Dr.Pascalle December 3, 2004
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