A maternal insult (also referred to as a "yo mama" joke) is a reference to a person's mother. This is through the use of phrases such as "your mother" or other variations, often used to insult the target by way of their mother.[1] "Your mother" can be combined with most types of insults, although suggestions of promiscuity are common.[2] One of the purposes of these insults is to incite violence.[3] Slang variants such as "yo mama", "yo momma", "ur mom", "yer ma", "ya mum", "your mum", "ya mudda" or "your mom" are sometimes used, depending on the local dialect.