By skips is an expression that means to move, progress or proceed in an irregular or uneven manner. There are several synonyms that can be used to replace this expression, such as haphazardly, sporadically, intermittently, erratically, fitfully, unevenly, randomly, and patchily, among others. These synonyms carry the same idea of inconsistency and irregularity in movement or progress. Using these synonyms can help add variety to your writing and avoid repetition, making your content more engaging and interesting. So, if you're looking for a way to replace the expression "by skips," consider using any of these synonyms to convey the same meaning.