twelve o'clock flasher 

A person with no idea how to use any kind of technology. The joke is, all digital clocks, stereos, DVD players, VCRs and so on have their displays flashing 0:00 or 12:00 (twelve o'clock) because the person in question has no idea how to set the time, let alone use any other function offered.

{When standing behind someone at an ATM for a very long time} - What is taking him so long? He must be a twelve o'clock flasher..

I knew i was dealing with a twelve o'clock flasher when she put the CD in data side up.

Can you believe it?! He was trying to use his DVD-ROM to read a floppy! Bloody twelve o'clock flashers!

twelve o'clock flasher by Dass Booty October 27, 2003

Twelve o'clock 

Name given to girls with 10/10 asses but you never see their face. Commonly used when you and your buddy are walking behind a fine ass and you casually call out 12:00 to signal your bud.

Matt: Hey Zach, 12:00
Zach: fucking hell twelve o'clock is ahead of us again
Matt: I want to see what she looks like
Zach: That would ruin the magic of a twelve o'clock

Twelve o'clock by Tyco_ February 28, 2017

twelve o'clock flasher 

tech support term
will never be able to fix the problem on the computer
a person who will never and should never be let near a computer.

We've got a twelve o'clock flasher

twelve o'clock flasher by Pony Boy September 10, 2003

Twelve o'clock in Australia 

Slang for a boner.

Straight up down under.

I never need to check the time when I see your mom because it's always twelve o'clock in Australia.

Twelve o'clock in Australia by revolution2424 March 9, 2019

Twelve O'Clock Redeye 

Putting salt in the nose, taking a drink, and putting lime juice in the eye.

A dare to conduct a twelve o'clock redeye

Twelve O'Clock Redeye by slang_1 December 28, 2014

Twelve O One 

Describes a black person who’s darker than midnight.

Man you’re twelve o one! Huh? You’re darker than midnight Tyrone!

Twelve O One by Patriot1975 March 9, 2019

Twelve O’ Clock 

When you try to get someone to notice a cute/attractive person.

“Dude, look! A cute girl at twelve o’ clock!”

Twelve O’ Clock by EmmaRosie July 5, 2021