"Your mum"
1. unfinished sentance
2. no actual insult
3. can easily be turned into a compliment which i do when a sad low life tries it,,,, i say back to them "ya i know she makes awesome food"
4. just sounds plain dumb
5. is actually a cheap version of a yo momma joke but some idot thought it would be cool to just say the yo mom part and it will be even more cool (which it is not)
6. the devil himself thinks it's a crap and cheap way to insult
7. saying it to god won't work
9. again can be easily countered "hey there watch ya doing ?" other guy says "your mum" origianl guy replies "sigh,, i remember my mum she died so shockingly" other guy instantly relizies he is a offical asshole and tries to apologize then original guy says "HA gotcha ya !!!"
10. most people who say are useally low class and failing