The phrase "look like a saddle on a sow" is an insulting idiom used to describe something that looks awkward, unattractive, or out of place. There are several other synonyms for this phrase that can be used in its place. Some of these synonyms include "stick out like a sore thumb," "look out of place," or "seem inappropriate." Other similar idioms that could be used include "as welcome as a skunk at a picnic," "as useful as a screen door on a submarine," and "as awkward as a bull in a china shop." These phrases can be used to describe anything that seems out of place or is not appropriate for a particular situation.