An insult used by those who have a minimal
vocabulary*. Usually in an attempt to upset or hurt the person who dared to insult this person by trying to
undermine their mother. Never followed by anything. For example - Your mum smells etc...
It is related to another insult in this wonderful array of words.
Ya Mam.
This insult is gramatically incorect showing that the persons incoherency is shocking by using this insult. Futhermore, Ya is not a word.
Overall, Your Mum is a Pointless insult. Used by chavs for chavs.
* In this case, minimal
vocabulary means words like food, beer & usually swear words.