"Doodly squats" is a slang term that refers to something that is deemed worthless or insignificant. There are several synonyms that can be used to replace this phrase. Words like "nada," "zilch," "zip," "nothing," or "nil" can all be used to convey the same meaning. Other phrases like "worthless," "pointless," "useless," "ineffective," or "futile" can also be used to replace "doodly squats." These synonyms can be used interchangeably depending on the context and the tone of the conversation. By using these synonyms, you can express your disapproval or dissatisfaction towards something without being offensive or disrespectful.