noun

a display of excitement or fuss over an unimportant matter.

I never saw such a carry-on!

fuss,commotion,trouble,bother,upset,agitation,stir,excitement,ado,hurly-burly,palaver,rigmarole,nonsense,hoo-ha,ballyhoo,song and dance,performance,pantomime,hoopla,rumpus,monkey business,jiggery-pokery,carrying-on,kerfuffle