The enjoyment of the pleasures of the moment without concern for the future.
The original source for this Latin phrase is the lyric poet Quintus Horatius Flaccus more widely known as Horace. The term is first found in Odes Book I: Dum loquimur, fugerit invida Aetas: carpe diem, quam minimum credula postero. This quotation translates as: While we’re talking, envious time is fleeing: pluck the day, put no trust in the future.