1, 2, 3, Five Edit Meaning

1.

when you do something really stupid but are oblivious to it at the time.

it all started when my dopey friend listed something as

1)

2)

3)

5)

without realising, because she's an idiot :)

an example of "1, 2, 3, FIVE"

nida: and i told him i thought the moon was made of cheese! how stupid!!

me: yehh obvs! that was soo 1,2,3, FIVE

See 1, 2, 3, five, dumb, stupid