Used by mostly horny ass 12-year-olds that have nothing better to do
Person 1: Why were you late
Horny 12 year old: Because of your mom
When somebody says "Your Mom" it means that he/she fucks your mom.
"Your Mom."
when someone like a friend,teacher, or parent ask what you are doing or ask a question you always say "your mom" in the sentence
john-"what did u eat last night"
you- "your mom"