When your boss does somethnig just as you're about to clock out that fucks up the rest of your day or weekend. Typically, this is comprised of a request for you to do some work and is due to laziness and/or lack of preparedness on their part.

This is a reference to an episode of MASH where the enemy would fly in everyday at 5 o'cock and drop a bomb on the camp's garbage pile.
Darcy is such a shitty boss. She came in to my office just as I was clocking out and told me she needed the last 2 weeks of bank records before I go. She knew about this request a long time ago but since she sucks as a manager and a human being, she thinks it's okay to routinely drop these 5 o'clock Charlies in my lap.
by ImaLuzer May 25, 2018
Get the 5 o'clock Charlie mug.
The dirtiest of the dirty, the most unattractive girl at the bar and your last option if you want to get laid that night. This girl is usually so unattractive 2am isn't enough time to drink to make her worth it, around 5 is when she becomes an option
Man i must have of been hammered last night i woke up next to a real piece of 5 o'clock slop.

see also road whore
by king dingaling89 October 26, 2010
Get the 5 o'clock slop mug.
the prompt 4:54pm Friday evening arrival of a certain visitor with a critical (due today) case that has been sitting on that visitor’s desk for 5 months and 29 days – yet needs to be out today!
F: Damn, I can't make the party tonight! I just got 5 o'clock blocked by one of my bosses! I'll be pulling another all-nighter tonight!

G: 5 o'clock-blocked again!? That excuse is getting old.
by 5 o'clock-blockee September 16, 2011
Get the 5 o'clock block mug.
Term used to describe unprofessionalism. Someone using profanity or vulgarity to ridicule or reprimand someone usually in a work environment. Synonymous with verbally "going off on someone".
"Joanie is usually good at handling complaints, but she went "after 5 o'clock" on that customer. I have never heard so many four letter words in a row."
by Jimi James February 6, 2008
Get the after 5 o'clock mug.
When the majority of aircraft finish the flying for the day around the same time...generally around 1700L, and the crews write up maintanence issues. As result, many trips for the following day are put back in the uncovered file resulting in a 5 o'clock flush.
Boss, "Why do we have 12 trips for tomorrow still uncovered?"

Scheduler, " We just had 7 aircraft all finish their day and the crews wrote up their aircraft."

Boss, "Ahh, the 5 o'clock flush".
by Not A Mechanic August 5, 2011
Get the 5 o'clock flush mug.
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
Get the 5 o'clock shadow mug.
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 7, 2005
Get the 5 o'clock shadow mug.