Your thinking of sucking out the mids to extreme levels. Mid recession is any decrease in volume in the mid section relative to the highs and bass.
Example: If the mids are way too emphasized, the song will not sound good (most likely) because of a lack of balance. They would sound very dull and boring to say the least.
My point is this: the recession of mids can sound good (limitedly colored) as long as they don't take it too far. Its just another signature, like recessed highs, or bass, so it's more of a preference thing. I listen to J-Rock a lot it it sounds good on an M50, or a DT990. You just have to learn how to appreciate all the signatures.
Actually, it's the opposite. Sucked-out mids make the tune sound boring.