|1.||Le Fer Der|
1 —used to express actual or feigned ignorance or stupidity
2 —used derisively to indicate that something just stated is all too obvious or self-evident
"Twilight is bad?"
"LE FER DER! How did you not know that?"
"Wait, so you're telling me all women have vaginas?"
"Omigod, LE FER DER!"