are days when people can't get over the holidays and still feels like celebrating, they skip work/school/duties and enjoy the rest of the days like it is still the holidays.

When you're ex- girlfriend/boyfriend gets noticeably more attractive after the relationship is over:

Often a figmental allusion. Sometimes caused by a sudden motivation of the ex to impress others in means to consolidate their new entry into the single lifestyle.

The phenomenon that occurs after a play or stage performance where the actor/actress will say lines from said play for the next week or so in normal conversation inadvertently or by accident.