The phrase "gets down pat" means to master or perfect something. There are several synonyms for this phrase that can be used interchangeably. For example, one can say "gets the hang of it," "nails it," "perfects it," "masters it," "becomes proficient in it," "comes to grips with it," or "learns it inside out." These phrases all convey the idea that someone has achieved a high level of competence in a particular skill or subject. Whether it's mastering a sport or becoming an expert in a field, these phrases are perfect for expressing the idea of achieving success through hard work, determination, and dedication.