Answer:
Its days are numbered.
If the day before yesterday is the 23rd, then what is the day after tomorrow.
Low on cash? Pick out items from this rack.
White and thin, red within, with a nail at the end. What is it?
I'm often served as a "rack of ..." I'm often smoked or grilled, with bones in, and slathered in BBQ sauce.
I repeat only the last word you say. The more I repeat, the softer I got. I cannot be seen but can be heard. What am I?