Widespread, ineffective insult globally used by townies, kevs and their offspring. Used as a counter insult by citizens with the I.Q of a bucket of sewage water (and the B.O of one)
Your
mum originated, presumably, in the UK, which just adds another thing to the list that we'll be embarrased we thought of when we look back at this 10 years from now
Your
mum is effectively
dead towards punks, grungers, and emos, and ironically has been added to their
arsenal of townie impressions.
However, mentioning 'your
mum' to a townie or similar missing link of the gene code
may result in serious bodily harm, so if you do have to insult them, use words with more than 6 letters to leave them stunned and confused.