boner

名词 boner:

1. an embarrassing mistake
   同义词：blunder, blooper, bloomer, bungle, pratfall, foul-up, fuckup, flub, botch, boo-boo

形容词 bone:

1. consisting of or made up of bone
   同义词：bone

bon.er

n.Informal （名词）【非正式用语】
A blunder or an error.
蠢行：大错误或差错

来源：
bone(head)
bone(head)
-er
-er