To be straddle means to stand or sit with one leg on either side of something, usually an object. Some synonyms for this phrase could include: sit astride, ride astride, bestride, perch, top, mount, or saddle. These words can be used interchangeably to describe the position of someone's legs and body as they straddle an object such as a horse, bike, or fence. Each of these words conveys a slightly different nuance but carries the same underlying meaning of straddling, which is to sit or stand with one leg on either side. Using synonyms can help to vary one's writing and language, making it more interesting and diverse.