moment

at a moment's notice: see at short notice atnotice.

have your (or its) moments have short periods that are better or more impressive than others.

man of the moment: seeman.

moment of truth a crisis; a turning point when a decision has to be made or a crisis faced.

☞ This expression is a translation of the Spanish el momento de la verdad, which refers to the final sword thrust in a bullfight.

never a dull moment: seedull.

on the spur of the moment: seespur.

senior moment: seesenior.