Not skip them, as in your put them in bed and they just don't take a nap, but when you are out and about or have something going on and they just miss their nap. Or you let them skip their nap that day?

LO2 is 2 and the past couple of months about 1-2 times per week I have been letting her pass on taking her nap, usually when we have a busy day, on the weekends. Luckily she gets back into her groove and will nap when I lay her down the next day, and not fight it. The perk to no nap days is she goes to bed a lot easier!