Real Dictionary

fuss
singular noun: Fuss is anxious or excited behaviour which serves no useful purpose.
verb: If you fuss over someone, you pay them a lot of attention and do things to make them happy or comfortable.
verb: If you fuss, you worry or behave in a nervous, anxious way about unimportant matters or rush around doing unnecessary things.

fuss in American English
a flurry of nervous, excited, often needless activity; bustle
to bother or worry unnecessarily
to cause or make a fuss
intransitive verb: to make a fuss; make much ado about trifles
noun: an excessive display of anxious attention or activity; needless or useless bustle
transitive verb: to disturb, esp. with trifles; annoy; bother

fuss in British English
noun: nervous activity or agitation, esp when disproportionate or unnecessary
verb: to worry unnecessarily