bus·tle 1 
(b
ŭs
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 the Appendix of Indo-European roots.]