Short beard stubble on a man's face that has grown since the morning shave, usually experienced towards the end of the day.
Can be used to describe a man who looks scruffy, overworked/tired, hung-over or rugged.

"Rough night last night? Got that 5 o'clock shadow."
by StephenCarr October 18, 2005
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the facial hair that comes late in the day when a man has shaved earlier
Naturally he had a 5 o'clock shadow again.
by The Return of Light Joker April 16, 2008
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When you purposely walk in on your brother jerking off while your jerking off.
"I had that Paris Hilton video going in my room while I was cranking one out, when my older brother bill-dog walked in on me while he was beating off and laughing like a maniac! Bill-dog hit me with the worst 5 o'clock shadow! I was so embarrassed!"
by normal dude September 12, 2009
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An abundance of pubic hairs that have collected on the rim or bowl of a toilet or urinal.
Yo! Someone needs to shave the pisser man, its got a nasty 5 o'clock shadow.
by nate_j_y December 06, 2005
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When one develops an orange stain around the lower face after a day of sitting on the couch and eating Cheetos.

The mark of a true couch potato.
Girl 1: I come home from work every day and my orange-faced boyfriend is just sitting there with the remote.

Girl 2: Uh oh, its a 5 o'clock cheesy shadow.
by TheMusicNote18 March 09, 2011
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