I always like skirting fleeces - all that lovely woolly stuff spread out on the table. In a shearing shed, the actual belly gets removed and put into a separate bin as the shearer removes it, together with the very short woo on the poll (top of the head). Once the fleece is off and thrown onto the classing table, the the roustabout or the classer removes all the "daggy" bits. I called my bag of removed bits "bellies, bums and armpits", much to the amusement of the wool buyer who took the fleeces surplus to my requirements.
So, you get the idea - the short bits from the legs, the bits that have matted under the front and back legs, the piece on each side that connected to the belly (very seedy usually) and the area around the tail (less said about that area the better) and anything that is discoloured or second cuts (the very short bits) all go into the "skirtings" bag.