There are several synonyms for the phrase "sat pretty" that can be used in various contexts. One such term is "looked poised", which refers to someone who is sitting or standing confidently. Another one is "seated elegantly", which can indicate someone who is sitting gracefully and with sophistication. "Perched comfortably" is another phrase that implies a relaxed and confident posture. Other options include "sitting pretty", "in good form", "composedly seated", "sitting confidently", and "in good posture". These synonyms can be used interchangeably to create vibrant and varied language that adds colour to your writing.