The most versatile dis/comeback ever created in the history of your mom. Usually it has no effect or sense (especially when used in response to your mom or when you're talking to someone's mom), but it's hilarious when you use it right.
1. guy: Look at that fat kid!
guy #2: Holy shit! Is that your mom?!
2. guy: What's your favorite food?
guy #2: Your mom
3. teacher: John, how often does 35 + 34 = 69?
john: As often as I 69 your mom every Friday night.
teacher: John! Go to the office, I'm calling your mom!
john: No, I'M calling YOUR mom.
Teacher: Why didn't you turn in your homework?
Me: Your mom.
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Teacher: What do you think your doing, sleeping in class?!
Me:...Your mom.
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Teacher: Any questions?
Me: Your mom... I mean, your mom?