1
general::
Concentrate on the present, with little or no concern for the future. For example, Instead of putting aside funds for the children's education, Jane and Jim live for the moment, spending whatever they earn. [Mid-1900s] Also see FOR THE MOMENT; DAY TO DAY, def. 2.
American Heritage Idioms
2
general::
Phrase(s): live for the moment
Fig. to live only for the pleasures of the present time without planning for the future. • You need to make plans for your future. You cannot live just for the moment! • He lives only for the moment.
McGrawhill's American Idioms And Phrasal Verbs