It just says that 'da sifu is an insult', not literally what it means. I know there isn't always a literal translation however. Im far too curious.
I can't remember the literal translation but what it basically means is your kung fu is like an embroidered pillow, pretty on the outside but soft on the inside. Basically its pretty to look at but full of fluff.
My sanda shifu liked that one in reference to a sifu in my area who shall remain nameless
Ah... that's similar to my insult... Flower Hand Brocade Leg