When wearing scrubs, the freedom can excite the junk into a boner, though not an angry one. Discovered at wilford hall medical center.
Dude, I was working the other night, and I got so relaxed / tired, I sprouted a hella sleepy boner.
by Saint947 July 30, 2010

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Top Definition
when a man is tired, bored, normally in the morning at his desk, while riding in the car, train or the bus, where he gets so relaxed that he pops a gigantic stiffy that he needs to hide and attempt to get rid of before he needs to stand up.

cures for sleepy boners include thinking about old people, saggy beef curtains, and imagining the sickest person you can think of naked.
When my train stop came up, I had to carry my messenger bag in the front because I could not get rid of my sleepy boner in time. I hope no one runs into it.
by Mattman18 July 20, 2010

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

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The act of getting a boner during a sleepy state or before falling asleep while attempting to stay awake. It is also hard to get rid of.not to be confused with morning wood.
I couldn't get out of my seat in class because I got a sleepyboner almost falling asleep.
by duhbeezneez July 12, 2014

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt