relatively usefull comback to anything that is thrown at you. Usually used by people who are dumb and have trouble staying on the toilet.
Harry: Your a fucking wanker Terry!
Terry: So'z your mum
Harry: My mum is dead Terry
Terry: So'z your mum, aww look i fell off the toilet
Terry: So'z your mum
Harry: My mum is dead Terry
Terry: So'z your mum, aww look i fell off the toilet
by fuck_ma_arse_ah April 26, 2009
Get the so'z your mummug.