"Gyp joint" is a term used for a dubious or dishonest place. It is basically a slang word that is often used in informal conversations. To express the same meaning, there are several other synonyms that one can use. These include "scam joint," "racket," "bodge house," "monkey business," "shoddy shack," "fraud joint," and "swindle house." All of these terms connotate a place where people indulge in activities that are unethical and often illegal. However, these terms differ slightly in usage and tone. Some are more formal, while others are more casual. Ultimately, all these synonyms serve to describe a place that one should be wary of.