@Badpack is saying that because the half-life of Abilify is around 3 days, if you take a dose of this drug on one day, you are going to have Abilify in your body for the next week or so.
So you cannot take a dose of Abilify on one day, and then on the next day decide to take a day off and not take this drug, because you will be under the effects of Abilify for a week or so.
By contrast, with amisulpride, which has a half-life of 12 hours, if you take a dose one day, by the next day, most of the drug will be out of your body, so you could take a day off the next day if you wanted, but not taking the drug the next day.