Verb
rearrange the deck chairs on the Titanic (third-person singular simple present rearranges the deck chairs on the Titanic, present participle rearranging the deck chairs on the Titanic, simple past and past participle rearranged the deck chairs on the Titanic)
(idiomatic) To do something pointless or insignificant that will soon be overtaken by events, or that contributes nothing to the solution of a current problem.