Frank Iero Derangement Syndrome - a condition suffered by those who experience ungodly amounts of attraction to Frank Iero.
Oh god, Frank Iero posted a selfie on Instagram! My FIDS is acting up!
"FUCK IT DOG" - as used when you literally give absolutely no fucks. It is a way of living life. If you say FID directly after any situation goes sour, you immediately feel better. Life goes on. FID.
Roscoe, "did you see Butch sniffing that line of blow off that strippers snatch?"
Carl, "hell yeah, I heard he said FID and started eatin that bitches beaver while he was down there"
Roscoe, "whats that mean?"
Carl, "FUCK IT DOG"