[freebeard]

Once again, baiting Xist. Sorry [to both]. Multiple layers of meaning

bus·tle 1 (bŭs′əl)
intr. & tr.v. bus·tled, bus·tling, bus·tles
To move or cause to move energetically and busily.
n.
Excited and often noisy activity; a stir.
[Possibly variant of obsolete buskle, frequentative of busk, to prepare oneself, from Old Norse būask, reflexive of būa, to prepare; see bheuə- in Indo-European roots.]
bus·tle 2 (bŭs′əl)
n.
1. A frame or pad to support and expand the fullness of the back of a skirt.
2. A bow, peplum, or gathering of material at the back of a skirt below the waist.
[Origin unknown.]