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!