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"
what I'm doing tonight ;)
You: what are you doing later?
me: Your mom
Every time someone says what doing you say your mom
Lily: what doing
Jaxson: your mom