|1.||school boy error|
Making the most basic of simple mistakes, worthy of ridicule, particularly when you should know better
School boy error!!
I just made a school boy error!
He school boyed!
|2.||school boy error|
school boy error is when you make a simple yet stupid mistake. you feel stupid after you've done it.
"i just locked my keys in the house!"
"haha, school boy error!!"