The phrase "gat scot free" is an idiomatic expression that is often used to describe someone who gets away with something without any punishment or consequence. Some synonyms that can be used to convey the same meaning include "go unpunished," "get off scot-free," "escape unscathed," "avoid penalty," "evade punishment," and "walk away free." These phrases can be used interchangeably in various situations where someone escapes punishment or consequence for their actions. It is important to note, however, that these phrases are often used colloquially and do not necessarily connote a legal or official exoneration from wrongdoing.